X-Git-Url: https://scripts.mit.edu/gitweb/autoinstalls/wordpress.git/blobdiff_plain/446fc046ca303b25776b07134407239bdeafa3e6..8d3bb1a5dcfdea9857d3c88c3751f09593e34dc8:/wp-includes/formatting.php

diff --git a/wp-includes/formatting.php b/wp-includes/formatting.php
index 97a290ad..2701c1a1 100644
--- a/wp-includes/formatting.php
+++ b/wp-includes/formatting.php
@@ -20,7 +20,7 @@
  *
  * Code within certain html blocks are skipped.
  *
- * Do not use this function before the 'init' action hook; everything will break.
+ * Do not use this function before the {@see 'init'} action hook; everything will break.
  *
  * @since 0.71
  *
@@ -66,7 +66,7 @@ function wptexturize( $text, $reset = false ) {
 	// Set up static variables. Run once only.
 	if ( $reset || ! isset( $static_characters ) ) {
 		/**
-		 * Filter whether to skip running wptexturize().
+		 * Filters whether to skip running wptexturize().
 		 *
 		 * Passing false to the filter will effectively short-circuit wptexturize().
 		 * returning the original text passed to the function instead.
@@ -195,7 +195,7 @@ function wptexturize( $text, $reset = false ) {
 
 	// Must do this every time in case plugins use these filters in a context sensitive manner
 	/**
-	 * Filter the list of HTML elements not to texturize.
+	 * Filters the list of HTML elements not to texturize.
 	 *
 	 * @since 2.8.0
 	 *
@@ -203,7 +203,7 @@ function wptexturize( $text, $reset = false ) {
 	 */
 	$no_texturize_tags = apply_filters( 'no_texturize_tags', $default_no_texturize_tags );
 	/**
-	 * Filter the list of shortcodes not to texturize.
+	 * Filters the list of shortcodes not to texturize.
 	 *
 	 * @since 2.8.0
 	 *
@@ -934,7 +934,7 @@ function _wp_specialchars( $string, $quote_style = ENT_NOQUOTES, $charset = fals
 
 	$string = @htmlspecialchars( $string, $quote_style, $charset, $double_encode );
 
-	// Backwards compatibility
+	// Back-compat.
 	if ( 'single' === $_quote_style )
 		$string = str_replace( "'", ''', $string );
 
@@ -1124,7 +1124,374 @@ function utf8_uri_encode( $utf8_string, $length = 0 ) {
  *
  * If there are no accent characters, then the string given is just returned.
  *
+ * **Accent characters converted:**
+ *
+ * Currency signs:
+ *
+ * |   Code   | Glyph | Replacement |     Description     |
+ * | -------- | ----- | ----------- | ------------------- |
+ * | U+00A3   | £     | (empty)     | British Pound sign  |
+ * | U+20AC   | €     | E           | Euro sign           |
+ *
+ * Decompositions for Latin-1 Supplement:
+ *
+ * |  Code   | Glyph | Replacement |               Description              |
+ * | ------- | ----- | ----------- | -------------------------------------- |
+ * | U+00AA  | ª     | a           | Feminine ordinal indicator             |
+ * | U+00BA  | º     | o           | Masculine ordinal indicator            |
+ * | U+00C0  | À     | A           | Latin capital letter A with grave      |
+ * | U+00C1  | Á     | A           | Latin capital letter A with acute      |
+ * | U+00C2  | Â     | A           | Latin capital letter A with circumflex |
+ * | U+00C3  | Ã     | A           | Latin capital letter A with tilde      |
+ * | U+00C4  | Ä     | A           | Latin capital letter A with diaeresis  |
+ * | U+00C5  | Å     | A           | Latin capital letter A with ring above |
+ * | U+00C6  | Æ     | AE          | Latin capital letter AE                |
+ * | U+00C7  | Ç     | C           | Latin capital letter C with cedilla    |
+ * | U+00C8  | È     | E           | Latin capital letter E with grave      |
+ * | U+00C9  | É     | E           | Latin capital letter E with acute      |
+ * | U+00CA  | Ê     | E           | Latin capital letter E with circumflex |
+ * | U+00CB  | Ë     | E           | Latin capital letter E with diaeresis  |
+ * | U+00CC  | Ì     | I           | Latin capital letter I with grave      |
+ * | U+00CD  | Í     | I           | Latin capital letter I with acute      |
+ * | U+00CE  | Î     | I           | Latin capital letter I with circumflex |
+ * | U+00CF  | Ï     | I           | Latin capital letter I with diaeresis  |
+ * | U+00D0  | Ð     | D           | Latin capital letter Eth               |
+ * | U+00D1  | Ñ     | N           | Latin capital letter N with tilde      |
+ * | U+00D2  | Ò     | O           | Latin capital letter O with grave      |
+ * | U+00D3  | Ó     | O           | Latin capital letter O with acute      |
+ * | U+00D4  | Ô     | O           | Latin capital letter O with circumflex |
+ * | U+00D5  | Õ     | O           | Latin capital letter O with tilde      |
+ * | U+00D6  | Ö     | O           | Latin capital letter O with diaeresis  |
+ * | U+00D8  | Ø     | O           | Latin capital letter O with stroke     |
+ * | U+00D9  | Ù     | U           | Latin capital letter U with grave      |
+ * | U+00DA  | Ú     | U           | Latin capital letter U with acute      |
+ * | U+00DB  | Û     | U           | Latin capital letter U with circumflex |
+ * | U+00DC  | Ü     | U           | Latin capital letter U with diaeresis  |
+ * | U+00DD  | Ý     | Y           | Latin capital letter Y with acute      |
+ * | U+00DE  | Þ     | TH          | Latin capital letter Thorn             |
+ * | U+00DF  | ß     | s           | Latin small letter sharp s             |
+ * | U+00E0  | à     | a           | Latin small letter a with grave        |
+ * | U+00E1  | á     | a           | Latin small letter a with acute        |
+ * | U+00E2  | â     | a           | Latin small letter a with circumflex   |
+ * | U+00E3  | ã     | a           | Latin small letter a with tilde        |
+ * | U+00E4  | ä     | a           | Latin small letter a with diaeresis    |
+ * | U+00E5  | å     | a           | Latin small letter a with ring above   |
+ * | U+00E6  | æ     | ae          | Latin small letter ae                  |
+ * | U+00E7  | ç     | c           | Latin small letter c with cedilla      |
+ * | U+00E8  | è     | e           | Latin small letter e with grave        |
+ * | U+00E9  | é     | e           | Latin small letter e with acute        |
+ * | U+00EA  | ê     | e           | Latin small letter e with circumflex   |
+ * | U+00EB  | ë     | e           | Latin small letter e with diaeresis    |
+ * | U+00EC  | ì     | i           | Latin small letter i with grave        |
+ * | U+00ED  | í     | i           | Latin small letter i with acute        |
+ * | U+00EE  | î     | i           | Latin small letter i with circumflex   |
+ * | U+00EF  | ï     | i           | Latin small letter i with diaeresis    |
+ * | U+00F0  | ð     | d           | Latin small letter Eth                 |
+ * | U+00F1  | ñ     | n           | Latin small letter n with tilde        |
+ * | U+00F2  | ò     | o           | Latin small letter o with grave        |
+ * | U+00F3  | ó     | o           | Latin small letter o with acute        |
+ * | U+00F4  | ô     | o           | Latin small letter o with circumflex   |
+ * | U+00F5  | õ     | o           | Latin small letter o with tilde        |
+ * | U+00F6  | ö     | o           | Latin small letter o with diaeresis    |
+ * | U+00F8  | ø     | o           | Latin small letter o with stroke       |
+ * | U+00F9  | ù     | u           | Latin small letter u with grave        |
+ * | U+00FA  | ú     | u           | Latin small letter u with acute        |
+ * | U+00FB  | û     | u           | Latin small letter u with circumflex   |
+ * | U+00FC  | ü     | u           | Latin small letter u with diaeresis    |
+ * | U+00FD  | ý     | y           | Latin small letter y with acute        |
+ * | U+00FE  | þ     | th          | Latin small letter Thorn               |
+ * | U+00FF  | ÿ     | y           | Latin small letter y with diaeresis    |
+ *
+ * Decompositions for Latin Extended-A:
+ *
+ * |  Code   | Glyph | Replacement |                    Description                    |
+ * | ------- | ----- | ----------- | ------------------------------------------------- |
+ * | U+0100  | Ā     | A           | Latin capital letter A with macron                |
+ * | U+0101  | ā     | a           | Latin small letter a with macron                  |
+ * | U+0102  | Ă     | A           | Latin capital letter A with breve                 |
+ * | U+0103  | ă     | a           | Latin small letter a with breve                   |
+ * | U+0104  | Ą     | A           | Latin capital letter A with ogonek                |
+ * | U+0105  | ą     | a           | Latin small letter a with ogonek                  |
+ * | U+01006 | Ć     | C           | Latin capital letter C with acute                 |
+ * | U+0107  | ć     | c           | Latin small letter c with acute                   |
+ * | U+0108  | Ĉ     | C           | Latin capital letter C with circumflex            |
+ * | U+0109  | ĉ     | c           | Latin small letter c with circumflex              |
+ * | U+010A  | Ċ     | C           | Latin capital letter C with dot above             |
+ * | U+010B  | ċ     | c           | Latin small letter c with dot above               |
+ * | U+010C  | Č     | C           | Latin capital letter C with caron                 |
+ * | U+010D  | č     | c           | Latin small letter c with caron                   |
+ * | U+010E  | Ď     | D           | Latin capital letter D with caron                 |
+ * | U+010F  | ď     | d           | Latin small letter d with caron                   |
+ * | U+0110  | Đ     | D           | Latin capital letter D with stroke                |
+ * | U+0111  | đ     | d           | Latin small letter d with stroke                  |
+ * | U+0112  | Ē     | E           | Latin capital letter E with macron                |
+ * | U+0113  | ē     | e           | Latin small letter e with macron                  |
+ * | U+0114  | Ĕ     | E           | Latin capital letter E with breve                 |
+ * | U+0115  | ĕ     | e           | Latin small letter e with breve                   |
+ * | U+0116  | Ė     | E           | Latin capital letter E with dot above             |
+ * | U+0117  | ė     | e           | Latin small letter e with dot above               |
+ * | U+0118  | Ę     | E           | Latin capital letter E with ogonek                |
+ * | U+0119  | ę     | e           | Latin small letter e with ogonek                  |
+ * | U+011A  | Ě     | E           | Latin capital letter E with caron                 |
+ * | U+011B  | ě     | e           | Latin small letter e with caron                   |
+ * | U+011C  | Ĝ     | G           | Latin capital letter G with circumflex            |
+ * | U+011D  | ĝ     | g           | Latin small letter g with circumflex              |
+ * | U+011E  | Ğ     | G           | Latin capital letter G with breve                 |
+ * | U+011F  | ğ     | g           | Latin small letter g with breve                   |
+ * | U+0120  | Ä      | G           | Latin capital letter G with dot above             |
+ * | U+0121  | Ä¡     | g           | Latin small letter g with dot above               |
+ * | U+0122  | Ģ     | G           | Latin capital letter G with cedilla               |
+ * | U+0123  | ģ     | g           | Latin small letter g with cedilla                 |
+ * | U+0124  | Ĥ     | H           | Latin capital letter H with circumflex            |
+ * | U+0125  | ĥ     | h           | Latin small letter h with circumflex              |
+ * | U+0126  | Ħ     | H           | Latin capital letter H with stroke                |
+ * | U+0127  | ħ     | h           | Latin small letter h with stroke                  |
+ * | U+0128  | Ĩ     | I           | Latin capital letter I with tilde                 |
+ * | U+0129  | Ä©     | i           | Latin small letter i with tilde                   |
+ * | U+012A  | Ī     | I           | Latin capital letter I with macron                |
+ * | U+012B  | Ä«     | i           | Latin small letter i with macron                  |
+ * | U+012C  | Ĭ     | I           | Latin capital letter I with breve                 |
+ * | U+012D  | Ä­     | i           | Latin small letter i with breve                   |
+ * | U+012E  | Ä®     | I           | Latin capital letter I with ogonek                |
+ * | U+012F  | į     | i           | Latin small letter i with ogonek                  |
+ * | U+0130  | Ä°     | I           | Latin capital letter I with dot above             |
+ * | U+0131  | ı     | i           | Latin small letter dotless i                      |
+ * | U+0132  | IJ     | IJ          | Latin capital ligature IJ                         |
+ * | U+0133  | ij     | ij          | Latin small ligature ij                           |
+ * | U+0134  | Ä´     | J           | Latin capital letter J with circumflex            |
+ * | U+0135  | ĵ     | j           | Latin small letter j with circumflex              |
+ * | U+0136  | Ķ     | K           | Latin capital letter K with cedilla               |
+ * | U+0137  | Ä·     | k           | Latin small letter k with cedilla                 |
+ * | U+0138  | ĸ     | k           | Latin small letter Kra                            |
+ * | U+0139  | Ĺ     | L           | Latin capital letter L with acute                 |
+ * | U+013A  | ĺ     | l           | Latin small letter l with acute                   |
+ * | U+013B  | Ä»     | L           | Latin capital letter L with cedilla               |
+ * | U+013C  | ļ     | l           | Latin small letter l with cedilla                 |
+ * | U+013D  | Ľ     | L           | Latin capital letter L with caron                 |
+ * | U+013E  | ľ     | l           | Latin small letter l with caron                   |
+ * | U+013F  | Ä¿     | L           | Latin capital letter L with middle dot            |
+ * | U+0140  | ŀ     | l           | Latin small letter l with middle dot              |
+ * | U+0141  | Ł     | L           | Latin capital letter L with stroke                |
+ * | U+0142  | ł     | l           | Latin small letter l with stroke                  |
+ * | U+0143  | Ń     | N           | Latin capital letter N with acute                 |
+ * | U+0144  | ń     | n           | Latin small letter N with acute                   |
+ * | U+0145  | Ņ     | N           | Latin capital letter N with cedilla               |
+ * | U+0146  | ņ     | n           | Latin small letter n with cedilla                 |
+ * | U+0147  | Ň     | N           | Latin capital letter N with caron                 |
+ * | U+0148  | ň     | n           | Latin small letter n with caron                   |
+ * | U+0149  | ʼn     | N           | Latin small letter n preceded by apostrophe       |
+ * | U+014A  | Ŋ     | n           | Latin capital letter Eng                          |
+ * | U+014B  | ŋ     | N           | Latin small letter Eng                            |
+ * | U+014C  | Ō     | O           | Latin capital letter O with macron                |
+ * | U+014D  | ō     | o           | Latin small letter o with macron                  |
+ * | U+014E  | Ŏ     | O           | Latin capital letter O with breve                 |
+ * | U+014F  | ŏ     | o           | Latin small letter o with breve                   |
+ * | U+0150  | Ő     | O           | Latin capital letter O with double acute          |
+ * | U+0151  | ő     | o           | Latin small letter o with double acute            |
+ * | U+0152  | Π    | OE          | Latin capital ligature OE                         |
+ * | U+0153  | œ     | oe          | Latin small ligature oe                           |
+ * | U+0154  | Ŕ     | R           | Latin capital letter R with acute                 |
+ * | U+0155  | ŕ     | r           | Latin small letter r with acute                   |
+ * | U+0156  | Ŗ     | R           | Latin capital letter R with cedilla               |
+ * | U+0157  | ŗ     | r           | Latin small letter r with cedilla                 |
+ * | U+0158  | Ř     | R           | Latin capital letter R with caron                 |
+ * | U+0159  | ř     | r           | Latin small letter r with caron                   |
+ * | U+015A  | Ś     | S           | Latin capital letter S with acute                 |
+ * | U+015B  | ś     | s           | Latin small letter s with acute                   |
+ * | U+015C  | Ŝ     | S           | Latin capital letter S with circumflex            |
+ * | U+015D  | ŝ     | s           | Latin small letter s with circumflex              |
+ * | U+015E  | Ş     | S           | Latin capital letter S with cedilla               |
+ * | U+015F  | ş     | s           | Latin small letter s with cedilla                 |
+ * | U+0160  | Å      | S           | Latin capital letter S with caron                 |
+ * | U+0161  | Å¡     | s           | Latin small letter s with caron                   |
+ * | U+0162  | Ţ     | T           | Latin capital letter T with cedilla               |
+ * | U+0163  | ţ     | t           | Latin small letter t with cedilla                 |
+ * | U+0164  | Ť     | T           | Latin capital letter T with caron                 |
+ * | U+0165  | ť     | t           | Latin small letter t with caron                   |
+ * | U+0166  | Ŧ     | T           | Latin capital letter T with stroke                |
+ * | U+0167  | ŧ     | t           | Latin small letter t with stroke                  |
+ * | U+0168  | Ũ     | U           | Latin capital letter U with tilde                 |
+ * | U+0169  | Å©     | u           | Latin small letter u with tilde                   |
+ * | U+016A  | Ū     | U           | Latin capital letter U with macron                |
+ * | U+016B  | Å«     | u           | Latin small letter u with macron                  |
+ * | U+016C  | Ŭ     | U           | Latin capital letter U with breve                 |
+ * | U+016D  | Å­     | u           | Latin small letter u with breve                   |
+ * | U+016E  | Å®     | U           | Latin capital letter U with ring above            |
+ * | U+016F  | ů     | u           | Latin small letter u with ring above              |
+ * | U+0170  | Å°     | U           | Latin capital letter U with double acute          |
+ * | U+0171  | ű     | u           | Latin small letter u with double acute            |
+ * | U+0172  | Ų     | U           | Latin capital letter U with ogonek                |
+ * | U+0173  | ų     | u           | Latin small letter u with ogonek                  |
+ * | U+0174  | Å´     | W           | Latin capital letter W with circumflex            |
+ * | U+0175  | ŵ     | w           | Latin small letter w with circumflex              |
+ * | U+0176  | Ŷ     | Y           | Latin capital letter Y with circumflex            |
+ * | U+0177  | Å·     | y           | Latin small letter y with circumflex              |
+ * | U+0178  | Ÿ     | Y           | Latin capital letter Y with diaeresis             |
+ * | U+0179  | Ź     | Z           | Latin capital letter Z with acute                 |
+ * | U+017A  | ź     | z           | Latin small letter z with acute                   |
+ * | U+017B  | Å»     | Z           | Latin capital letter Z with dot above             |
+ * | U+017C  | ż     | z           | Latin small letter z with dot above               |
+ * | U+017D  | Ž     | Z           | Latin capital letter Z with caron                 |
+ * | U+017E  | ž     | z           | Latin small letter z with caron                   |
+ * | U+017F  | Å¿     | s           | Latin small letter long s                         |
+ * | U+01A0  | Æ      | O           | Latin capital letter O with horn                  |
+ * | U+01A1  | Æ¡     | o           | Latin small letter o with horn                    |
+ * | U+01AF  | Ư     | U           | Latin capital letter U with horn                  |
+ * | U+01B0  | Æ°     | u           | Latin small letter u with horn                    |
+ * | U+01CD  | Ǎ     | A           | Latin capital letter A with caron                 |
+ * | U+01CE  | ǎ     | a           | Latin small letter a with caron                   |
+ * | U+01CF  | Ǐ     | I           | Latin capital letter I with caron                 |
+ * | U+01D0  | ǐ     | i           | Latin small letter i with caron                   |
+ * | U+01D1  | Ǒ     | O           | Latin capital letter O with caron                 |
+ * | U+01D2  | ǒ     | o           | Latin small letter o with caron                   |
+ * | U+01D3  | Ǔ     | U           | Latin capital letter U with caron                 |
+ * | U+01D4  | ǔ     | u           | Latin small letter u with caron                   |
+ * | U+01D5  | Ǖ     | U           | Latin capital letter U with diaeresis and macron  |
+ * | U+01D6  | ǖ     | u           | Latin small letter u with diaeresis and macron    |
+ * | U+01D7  | Ǘ     | U           | Latin capital letter U with diaeresis and acute   |
+ * | U+01D8  | ǘ     | u           | Latin small letter u with diaeresis and acute     |
+ * | U+01D9  | Ǚ     | U           | Latin capital letter U with diaeresis and caron   |
+ * | U+01DA  | ǚ     | u           | Latin small letter u with diaeresis and caron     |
+ * | U+01DB  | Ǜ     | U           | Latin capital letter U with diaeresis and grave   |
+ * | U+01DC  | ǜ     | u           | Latin small letter u with diaeresis and grave     |
+ *
+ * Decompositions for Latin Extended-B:
+ *
+ * |   Code   | Glyph | Replacement |                Description                |
+ * | -------- | ----- | ----------- | ----------------------------------------- |
+ * | U+0218   | Ș     | S           | Latin capital letter S with comma below   |
+ * | U+0219   | ș     | s           | Latin small letter s with comma below     |
+ * | U+021A   | Ț     | T           | Latin capital letter T with comma below   |
+ * | U+021B   | ț     | t           | Latin small letter t with comma below     |
+ *
+ * Vowels with diacritic (Chinese, Hanyu Pinyin):
+ *
+ * |   Code   | Glyph | Replacement |                      Description                      |
+ * | -------- | ----- | ----------- | ----------------------------------------------------- |
+ * | U+0251   | ɑ     | a           | Latin small letter alpha                              |
+ * | U+1EA0   | Ạ     | A           | Latin capital letter A with dot below                 |
+ * | U+1EA1   | ạ     | a           | Latin small letter a with dot below                   |
+ * | U+1EA2   | Ả     | A           | Latin capital letter A with hook above                |
+ * | U+1EA3   | ả     | a           | Latin small letter a with hook above                  |
+ * | U+1EA4   | Ấ     | A           | Latin capital letter A with circumflex and acute      |
+ * | U+1EA5   | ấ     | a           | Latin small letter a with circumflex and acute        |
+ * | U+1EA6   | Ầ     | A           | Latin capital letter A with circumflex and grave      |
+ * | U+1EA7   | ầ     | a           | Latin small letter a with circumflex and grave        |
+ * | U+1EA8   | Ẩ     | A           | Latin capital letter A with circumflex and hook above |
+ * | U+1EA9   | ẩ     | a           | Latin small letter a with circumflex and hook above   |
+ * | U+1EAA   | Ẫ     | A           | Latin capital letter A with circumflex and tilde      |
+ * | U+1EAB   | ẫ     | a           | Latin small letter a with circumflex and tilde        |
+ * | U+1EA6   | Ậ     | A           | Latin capital letter A with circumflex and dot below  |
+ * | U+1EAD   | ậ     | a           | Latin small letter a with circumflex and dot below    |
+ * | U+1EAE   | Ắ     | A           | Latin capital letter A with breve and acute           |
+ * | U+1EAF   | ắ     | a           | Latin small letter a with breve and acute             |
+ * | U+1EB0   | Ằ     | A           | Latin capital letter A with breve and grave           |
+ * | U+1EB1   | ằ     | a           | Latin small letter a with breve and grave             |
+ * | U+1EB2   | Ẳ     | A           | Latin capital letter A with breve and hook above      |
+ * | U+1EB3   | ẳ     | a           | Latin small letter a with breve and hook above        |
+ * | U+1EB4   | Ẵ     | A           | Latin capital letter A with breve and tilde           |
+ * | U+1EB5   | ẵ     | a           | Latin small letter a with breve and tilde             |
+ * | U+1EB6   | Ặ     | A           | Latin capital letter A with breve and dot below       |
+ * | U+1EB7   | ặ     | a           | Latin small letter a with breve and dot below         |
+ * | U+1EB8   | Ẹ     | E           | Latin capital letter E with dot below                 |
+ * | U+1EB9   | ẹ     | e           | Latin small letter e with dot below                   |
+ * | U+1EBA   | Ẻ     | E           | Latin capital letter E with hook above                |
+ * | U+1EBB   | ẻ     | e           | Latin small letter e with hook above                  |
+ * | U+1EBC   | Ẽ     | E           | Latin capital letter E with tilde                     |
+ * | U+1EBD   | ẽ     | e           | Latin small letter e with tilde                       |
+ * | U+1EBE   | Ế     | E           | Latin capital letter E with circumflex and acute      |
+ * | U+1EBF   | ế     | e           | Latin small letter e with circumflex and acute        |
+ * | U+1EC0   | Ề     | E           | Latin capital letter E with circumflex and grave      |
+ * | U+1EC1   | ề     | e           | Latin small letter e with circumflex and grave        |
+ * | U+1EC2   | Ể     | E           | Latin capital letter E with circumflex and hook above |
+ * | U+1EC3   | ể     | e           | Latin small letter e with circumflex and hook above   |
+ * | U+1EC4   | Ễ     | E           | Latin capital letter E with circumflex and tilde      |
+ * | U+1EC5   | ễ     | e           | Latin small letter e with circumflex and tilde        |
+ * | U+1EC6   | Ệ     | E           | Latin capital letter E with circumflex and dot below  |
+ * | U+1EC7   | ệ     | e           | Latin small letter e with circumflex and dot below    |
+ * | U+1EC8   | Ỉ     | I           | Latin capital letter I with hook above                |
+ * | U+1EC9   | ỉ     | i           | Latin small letter i with hook above                  |
+ * | U+1ECA   | Ị     | I           | Latin capital letter I with dot below                 |
+ * | U+1ECB   | ị     | i           | Latin small letter i with dot below                   |
+ * | U+1ECC   | Ọ     | O           | Latin capital letter O with dot below                 |
+ * | U+1ECD   | ọ     | o           | Latin small letter o with dot below                   |
+ * | U+1ECE   | Ỏ     | O           | Latin capital letter O with hook above                |
+ * | U+1ECF   | ỏ     | o           | Latin small letter o with hook above                  |
+ * | U+1ED0   | Ố     | O           | Latin capital letter O with circumflex and acute      |
+ * | U+1ED1   | ố     | o           | Latin small letter o with circumflex and acute        |
+ * | U+1ED2   | Ồ     | O           | Latin capital letter O with circumflex and grave      |
+ * | U+1ED3   | ồ     | o           | Latin small letter o with circumflex and grave        |
+ * | U+1ED4   | Ổ     | O           | Latin capital letter O with circumflex and hook above |
+ * | U+1ED5   | ổ     | o           | Latin small letter o with circumflex and hook above   |
+ * | U+1ED6   | Ỗ     | O           | Latin capital letter O with circumflex and tilde      |
+ * | U+1ED7   | ỗ     | o           | Latin small letter o with circumflex and tilde        |
+ * | U+1ED8   | Ộ     | O           | Latin capital letter O with circumflex and dot below  |
+ * | U+1ED9   | ộ     | o           | Latin small letter o with circumflex and dot below    |
+ * | U+1EDA   | Ớ     | O           | Latin capital letter O with horn and acute            |
+ * | U+1EDB   | ớ     | o           | Latin small letter o with horn and acute              |
+ * | U+1EDC   | Ờ     | O           | Latin capital letter O with horn and grave            |
+ * | U+1EDD   | ờ     | o           | Latin small letter o with horn and grave              |
+ * | U+1EDE   | Ở     | O           | Latin capital letter O with horn and hook above       |
+ * | U+1EDF   | ở     | o           | Latin small letter o with horn and hook above         |
+ * | U+1EE0   | á»      | O           | Latin capital letter O with horn and tilde            |
+ * | U+1EE1   | ỡ     | o           | Latin small letter o with horn and tilde              |
+ * | U+1EE2   | Ợ     | O           | Latin capital letter O with horn and dot below        |
+ * | U+1EE3   | ợ     | o           | Latin small letter o with horn and dot below          |
+ * | U+1EE4   | Ụ     | U           | Latin capital letter U with dot below                 |
+ * | U+1EE5   | ụ     | u           | Latin small letter u with dot below                   |
+ * | U+1EE6   | Ủ     | U           | Latin capital letter U with hook above                |
+ * | U+1EE7   | ủ     | u           | Latin small letter u with hook above                  |
+ * | U+1EE8   | Ứ     | U           | Latin capital letter U with horn and acute            |
+ * | U+1EE9   | ứ     | u           | Latin small letter u with horn and acute              |
+ * | U+1EEA   | Ừ     | U           | Latin capital letter U with horn and grave            |
+ * | U+1EEB   | ừ     | u           | Latin small letter u with horn and grave              |
+ * | U+1EEC   | Ử     | U           | Latin capital letter U with horn and hook above       |
+ * | U+1EED   | á»­     | u           | Latin small letter u with horn and hook above         |
+ * | U+1EEE   | á»®     | U           | Latin capital letter U with horn and tilde            |
+ * | U+1EEF   | ữ     | u           | Latin small letter u with horn and tilde              |
+ * | U+1EF0   | á»°     | U           | Latin capital letter U with horn and dot below        |
+ * | U+1EF1   | á»±     | u           | Latin small letter u with horn and dot below          |
+ * | U+1EF2   | Ỳ     | Y           | Latin capital letter Y with grave                     |
+ * | U+1EF3   | ỳ     | y           | Latin small letter y with grave                       |
+ * | U+1EF4   | á»´     | Y           | Latin capital letter Y with dot below                 |
+ * | U+1EF5   | ỵ     | y           | Latin small letter y with dot below                   |
+ * | U+1EF6   | Ỷ     | Y           | Latin capital letter Y with hook above                |
+ * | U+1EF7   | á»·     | y           | Latin small letter y with hook above                  |
+ * | U+1EF8   | Ỹ     | Y           | Latin capital letter Y with tilde                     |
+ * | U+1EF9   | ỹ     | y           | Latin small letter y with tilde                       |
+ *
+ * German (`de_DE`), German formal (`de_DE_formal`), German (Switzerland) formal (`de_CH`),
+ * and German (Switzerland) informal (`de_CH_informal`) locales:
+ *
+ * |   Code   | Glyph | Replacement |               Description               |
+ * | -------- | ----- | ----------- | --------------------------------------- |
+ * | U+00C4   | Ä     | Ae          | Latin capital letter A with diaeresis   |
+ * | U+00E4   | ä     | ae          | Latin small letter a with diaeresis     |
+ * | U+00D6   | Ö     | Oe          | Latin capital letter O with diaeresis   |
+ * | U+00F6   | ö     | oe          | Latin small letter o with diaeresis     |
+ * | U+00DC   | Ü     | Ue          | Latin capital letter U with diaeresis   |
+ * | U+00FC   | ü     | ue          | Latin small letter u with diaeresis     |
+ * | U+00DF   | ß     | ss          | Latin small letter sharp s              |
+ *
+ * Danish (`da_DK`) locale:
+ *
+ * |   Code   | Glyph | Replacement |               Description               |
+ * | -------- | ----- | ----------- | --------------------------------------- |
+ * | U+00C6   | Æ     | Ae          | Latin capital letter AE                 |
+ * | U+00E6   | æ     | ae          | Latin small letter ae                   |
+ * | U+00D8   | Ø     | Oe          | Latin capital letter O with stroke      |
+ * | U+00F8   | ø     | oe          | Latin small letter o with stroke        |
+ * | U+00C5   | Å     | Aa          | Latin capital letter A with ring above  |
+ * | U+00E5   | å     | aa          | Latin small letter a with ring above    |
+ *
+ * Catalan (`ca`) locale:
+ *
+ * |   Code   | Glyph | Replacement |               Description               |
+ * | -------- | ----- | ----------- | --------------------------------------- |
+ * | U+00B7   | l·l   | ll          | Flown dot (between two Ls)              |
+ *
  * @since 1.2.1
+ * @since 4.6.0 Added locale support for `de_CH`, `de_CH_informal`, and `ca`.
  *
  * @param string $string Text that might have accent characters
  * @return string Filtered string with replaced "nice" characters.
@@ -1313,7 +1680,7 @@ function remove_accents( $string ) {
 		// Used for locale-specific rules
 		$locale = get_locale();
 
-		if ( 'de_DE' == $locale || 'de_DE_formal' == $locale ) {
+		if ( 'de_DE' == $locale || 'de_DE_formal' == $locale || 'de_CH' == $locale || 'de_CH_informal' == $locale ) {
 			$chars[ chr(195).chr(132) ] = 'Ae';
 			$chars[ chr(195).chr(164) ] = 'ae';
 			$chars[ chr(195).chr(150) ] = 'Oe';
@@ -1328,6 +1695,8 @@ function remove_accents( $string ) {
 			$chars[ chr(195).chr(184) ] = 'oe';
 			$chars[ chr(195).chr(133) ] = 'Aa';
 			$chars[ chr(195).chr(165) ] = 'aa';
+		} elseif ( 'ca' === $locale ) {
+			$chars[ chr(108).chr(194).chr(183).chr(108) ] = 'll';
 		}
 
 		$string = strtr($string, $chars);
@@ -1364,7 +1733,8 @@ function remove_accents( $string ) {
  * operating systems and special characters requiring special escaping
  * to manipulate at the command line. Replaces spaces and consecutive
  * dashes with a single dash. Trims period, dash and underscore from beginning
- * and end of filename.
+ * and end of filename. It is not guaranteed that this function will return a
+ * filename that is allowed to be uploaded.
  *
  * @since 2.1.0
  *
@@ -1375,7 +1745,7 @@ function sanitize_file_name( $filename ) {
 	$filename_raw = $filename;
 	$special_chars = array("?", "[", "]", "/", "\\", "=", "<", ">", ":", ";", ",", "'", "\"", "&", "$", "#", "*", "(", ")", "|", "~", "`", "!", "{", "}", "%", "+", chr(0));
 	/**
-	 * Filter the list of characters to remove from a filename.
+	 * Filters the list of characters to remove from a filename.
 	 *
 	 * @since 2.8.0
 	 *
@@ -1389,13 +1759,21 @@ function sanitize_file_name( $filename ) {
 	$filename = preg_replace( '/[\r\n\t -]+/', '-', $filename );
 	$filename = trim( $filename, '.-_' );
 
+	if ( false === strpos( $filename, '.' ) ) {
+		$mime_types = wp_get_mime_types();
+		$filetype = wp_check_filetype( 'test.' . $filename, $mime_types );
+		if ( $filetype['ext'] === $filename ) {
+			$filename = 'unnamed-file.' . $filetype['ext'];
+		}
+	}
+
 	// Split the filename into a base and extension[s]
 	$parts = explode('.', $filename);
 
 	// Return if only one extension
 	if ( count( $parts ) <= 2 ) {
 		/**
-		 * Filter a sanitized filename string.
+		 * Filters a sanitized filename string.
 		 *
 		 * @since 2.8.0
 		 *
@@ -1441,7 +1819,7 @@ function sanitize_file_name( $filename ) {
  * Removes tags, octets, entities, and if strict is enabled, will only keep
  * alphanumeric, _, space, ., -, @. After sanitizing, it passes the username,
  * raw username (the username in the parameter), and the value of $strict as
- * parameters for the 'sanitize_user' filter.
+ * parameters for the {@see 'sanitize_user'} filter.
  *
  * @since 2.0.0
  *
@@ -1466,7 +1844,7 @@ function sanitize_user( $username, $strict = false ) {
 	$username = preg_replace( '|\s+|', ' ', $username );
 
 	/**
-	 * Filter a sanitized username string.
+	 * Filters a sanitized username string.
 	 *
 	 * @since 2.0.1
 	 *
@@ -1493,7 +1871,7 @@ function sanitize_key( $key ) {
 	$key = preg_replace( '/[^a-z0-9_\-]/', '', $key );
 
 	/**
-	 * Filter a sanitized key string.
+	 * Filters a sanitized key string.
 	 *
 	 * @since 3.0.0
 	 *
@@ -1524,7 +1902,7 @@ function sanitize_title( $title, $fallback_title = '', $context = 'save' ) {
 		$title = remove_accents($title);
 
 	/**
-	 * Filter a sanitized title string.
+	 * Filters a sanitized title string.
 	 *
 	 * @since 1.2.0
 	 *
@@ -1669,7 +2047,7 @@ function sanitize_html_class( $class, $fallback = '' ) {
 		return sanitize_html_class( $fallback );
 	}
 	/**
-	 * Filter a sanitized HTML class string.
+	 * Filters a sanitized HTML class string.
 	 *
 	 * @since 2.8.0
 	 *
@@ -1904,8 +2282,8 @@ function force_balance_tags( $text ) {
  * Acts on text which is about to be edited.
  *
  * The $content is run through esc_textarea(), which uses htmlspecialchars()
- * to convert special characters to HTML entities. If $richedit is set to true,
- * it is simply a holder for the 'format_to_edit' filter.
+ * to convert special characters to HTML entities. If `$richedit` is set to true,
+ * it is simply a holder for the {@see 'format_to_edit'} filter.
  *
  * @since 0.71
  * @since 4.4.0 The `$richedit` parameter was renamed to `$rich_text` for clarity.
@@ -1918,7 +2296,7 @@ function force_balance_tags( $text ) {
  */
 function format_to_edit( $content, $rich_text = false ) {
 	/**
-	 * Filter the text to be formatted for editing.
+	 * Filters the text to be formatted for editing.
 	 *
 	 * @since 1.2.0
 	 *
@@ -2002,7 +2380,7 @@ function untrailingslashit( $string ) {
  * Adds slashes to escape strings.
  *
  * Slashes will first be removed if magic_quotes_gpc is set, see {@link
- * http://www.php.net/magic_quotes} for more details.
+ * https://secure.php.net/magic_quotes} for more details.
  *
  * @since 0.71
  *
@@ -2104,8 +2482,7 @@ function antispambot( $email_address, $hex_encoding = 0 ) {
 /**
  * Callback to convert URI match to HTML A element.
  *
- * This function was backported from 2.5.0 to 2.3.2. Regex callback for {@link
- * make_clickable()}.
+ * This function was backported from 2.5.0 to 2.3.2. Regex callback for make_clickable().
  *
  * @since 2.3.2
  * @access private
@@ -2141,8 +2518,7 @@ function _make_url_clickable_cb( $matches ) {
 /**
  * Callback to convert URL match to HTML A element.
  *
- * This function was backported from 2.5.0 to 2.3.2. Regex callback for {@link
- * make_clickable()}.
+ * This function was backported from 2.5.0 to 2.3.2. Regex callback for make_clickable().
  *
  * @since 2.3.2
  * @access private
@@ -2171,8 +2547,7 @@ function _make_web_ftp_clickable_cb( $matches ) {
 /**
  * Callback to convert email address match to HTML A element.
  *
- * This function was backported from 2.5.0 to 2.3.2. Regex callback for {@link
- * make_clickable()}.
+ * This function was backported from 2.5.0 to 2.3.2. Regex callback for make_clickable().
  *
  * @since 2.3.2
  * @access private
@@ -2367,7 +2742,8 @@ function wp_rel_nofollow_callback( $matches ) {
 /**
  * Convert one smiley code to the icon graphic file equivalent.
  *
- * Callback handler for {@link convert_smilies()}.
+ * Callback handler for convert_smilies().
+ *
  * Looks up one smiley code in the $wpsmiliestrans global array and returns an
  * `<img>` string for that smiley.
  *
@@ -2397,7 +2773,7 @@ function translate_smiley( $matches ) {
 	}
 
 	/**
-	 * Filter the Smiley image URL before it's used in the image element.
+	 * Filters the Smiley image URL before it's used in the image element.
 	 *
 	 * @since 2.9.0
 	 *
@@ -2475,12 +2851,12 @@ function convert_smilies( $text ) {
  */
 function is_email( $email, $deprecated = false ) {
 	if ( ! empty( $deprecated ) )
-		_deprecated_argument( __FUNCTION__, '3.0' );
+		_deprecated_argument( __FUNCTION__, '3.0.0' );
 
 	// Test for the minimum length the email can be
 	if ( strlen( $email ) < 3 ) {
 		/**
-		 * Filter whether an email address is valid.
+		 * Filters whether an email address is valid.
 		 *
 		 * This filter is evaluated under several different contexts, such as 'email_too_short',
 		 * 'email_no_at', 'local_invalid_chars', 'domain_period_sequence', 'domain_period_limits',
@@ -2678,7 +3054,7 @@ function iso8601_timezone_to_offset( $timezone ) {
  *
  * @since 1.5.0
  *
- * @param string $date_string Date and time in ISO 8601 format {@link http://en.wikipedia.org/wiki/ISO_8601}.
+ * @param string $date_string Date and time in ISO 8601 format {@link https://en.wikipedia.org/wiki/ISO_8601}.
  * @param string $timezone    Optional. If set to GMT returns the time minus gmt_offset. Default is 'user'.
  * @return string The date and time in MySQL DateTime format - Y-m-d H:i:s.
  */
@@ -2717,7 +3093,7 @@ function sanitize_email( $email ) {
 	// Test for the minimum length the email can be
 	if ( strlen( $email ) < 3 ) {
 		/**
-		 * Filter a sanitized email address.
+		 * Filters a sanitized email address.
 		 *
 		 * This filter is evaluated under several contexts, including 'email_too_short',
 		 * 'email_no_at', 'local_invalid_chars', 'domain_period_sequence', 'domain_period_limits',
@@ -2860,7 +3236,7 @@ function human_time_diff( $from, $to = '' ) {
 	}
 
 	/**
-	 * Filter the human readable difference between two timestamps.
+	 * Filters the human readable difference between two timestamps.
 	 *
 	 * @since 4.0.0
 	 *
@@ -2879,8 +3255,8 @@ function human_time_diff( $from, $to = '' ) {
  * that, then the string ' [&hellip;]' will be appended to the excerpt. If the string
  * is less than 55 words, then the content will be returned as is.
  *
- * The 55 word limit can be modified by plugins/themes using the excerpt_length filter
- * The ' [&hellip;]' string can be modified by plugins/themes using the excerpt_more filter
+ * The 55 word limit can be modified by plugins/themes using the {@see 'excerpt_length'} filter
+ * The ' [&hellip;]' string can be modified by plugins/themes using the {@see 'excerpt_more'} filter
  *
  * @since 1.5.0
  *
@@ -2899,7 +3275,7 @@ function wp_trim_excerpt( $text = '' ) {
 		$text = str_replace(']]>', ']]&gt;', $text);
 
 		/**
-		 * Filter the number of words in an excerpt.
+		 * Filters the number of words in an excerpt.
 		 *
 		 * @since 2.7.0
 		 *
@@ -2907,7 +3283,7 @@ function wp_trim_excerpt( $text = '' ) {
 		 */
 		$excerpt_length = apply_filters( 'excerpt_length', 55 );
 		/**
-		 * Filter the string in the "more" link displayed after a trimmed excerpt.
+		 * Filters the string in the "more" link displayed after a trimmed excerpt.
 		 *
 		 * @since 2.9.0
 		 *
@@ -2917,7 +3293,7 @@ function wp_trim_excerpt( $text = '' ) {
 		$text = wp_trim_words( $text, $excerpt_length, $excerpt_more );
 	}
 	/**
-	 * Filter the trimmed excerpt string.
+	 * Filters the trimmed excerpt string.
 	 *
 	 * @since 2.8.0
 	 *
@@ -2973,7 +3349,7 @@ function wp_trim_words( $text, $num_words = 55, $more = null ) {
 	}
 
 	/**
-	 * Filter the text content after words have been trimmed.
+	 * Filters the text content after words have been trimmed.
 	 *
 	 * @since 3.3.0
 	 *
@@ -2996,7 +3372,7 @@ function wp_trim_words( $text, $num_words = 55, $more = null ) {
 function ent2ncr( $text ) {
 
 	/**
-	 * Filter text before named entities are converted into numbered entities.
+	 * Filters text before named entities are converted into numbered entities.
 	 *
 	 * A non-null string must be returned for the filter to be evaluated.
 	 *
@@ -3295,7 +3671,7 @@ function format_for_editor( $text, $default_editor = null ) {
 	}
 
 	/**
-	 * Filter the text after it is formatted for the editor.
+	 * Filters the text after it is formatted for the editor.
 	 *
 	 * @since 4.3.0
 	 *
@@ -3355,7 +3731,7 @@ function esc_sql( $data ) {
  * Checks and cleans a URL.
  *
  * A number of characters are removed from the URL. If the URL is for displaying
- * (the default behaviour) ampersands are also replaced. The 'clean_url' filter
+ * (the default behaviour) ampersands are also replaced. The {@see 'clean_url'} filter
  * is applied to the returned cleaned URL.
  *
  * @since 2.8.0
@@ -3364,7 +3740,7 @@ function esc_sql( $data ) {
  * @param array  $protocols Optional. An array of acceptable protocols.
  *		                    Defaults to return value of wp_allowed_protocols()
  * @param string $_context  Private. Use esc_url_raw() for database usage.
- * @return string The cleaned $url after the 'clean_url' filter is applied.
+ * @return string The cleaned $url after the {@see 'clean_url'} filter is applied.
  */
 function esc_url( $url, $protocols = null, $_context = 'display' ) {
 	$original_url = $url;
@@ -3448,7 +3824,7 @@ function esc_url( $url, $protocols = null, $_context = 'display' ) {
 	}
 
 	/**
-	 * Filter a string cleaned and escaped for output as a URL.
+	 * Filters a string cleaned and escaped for output as a URL.
 	 *
 	 * @since 2.3.0
 	 *
@@ -3475,7 +3851,7 @@ function esc_url_raw( $url, $protocols = null ) {
 /**
  * Convert entities, while preserving already-encoded entities.
  *
- * @link http://www.php.net/htmlentities Borrowed from the PHP Manual user notes.
+ * @link https://secure.php.net/htmlentities Borrowed from the PHP Manual user notes.
  *
  * @since 1.2.2
  *
@@ -3493,7 +3869,7 @@ function htmlentities2( $myHTML ) {
  *
  * Escapes text strings for echoing in JS. It is intended to be used for inline JS
  * (in a tag attribute, for example onclick="..."). Note that the strings have to
- * be in single quotes. The filter 'js_escape' is also applied here.
+ * be in single quotes. The {@see 'js_escape'} filter is also applied here.
  *
  * @since 2.8.0
  *
@@ -3507,7 +3883,7 @@ function esc_js( $text ) {
 	$safe_text = str_replace( "\r", '', $safe_text );
 	$safe_text = str_replace( "\n", '\\n', addslashes( $safe_text ) );
 	/**
-	 * Filter a string cleaned and escaped for output in JavaScript.
+	 * Filters a string cleaned and escaped for output in JavaScript.
 	 *
 	 * Text passed to esc_js() is stripped of invalid or special characters,
 	 * and properly slashed for output.
@@ -3532,7 +3908,7 @@ function esc_html( $text ) {
 	$safe_text = wp_check_invalid_utf8( $text );
 	$safe_text = _wp_specialchars( $safe_text, ENT_QUOTES );
 	/**
-	 * Filter a string cleaned and escaped for output in HTML.
+	 * Filters a string cleaned and escaped for output in HTML.
 	 *
 	 * Text passed to esc_html() is stripped of invalid or special characters
 	 * before output.
@@ -3557,7 +3933,7 @@ function esc_attr( $text ) {
 	$safe_text = wp_check_invalid_utf8( $text );
 	$safe_text = _wp_specialchars( $safe_text, ENT_QUOTES );
 	/**
-	 * Filter a string cleaned and escaped for output in an HTML attribute.
+	 * Filters a string cleaned and escaped for output in an HTML attribute.
 	 *
 	 * Text passed to esc_attr() is stripped of invalid or special characters
 	 * before output.
@@ -3581,7 +3957,7 @@ function esc_attr( $text ) {
 function esc_textarea( $text ) {
 	$safe_text = htmlspecialchars( $text, ENT_QUOTES, get_option( 'blog_charset' ) );
 	/**
-	 * Filter a string cleaned and escaped for output in a textarea element.
+	 * Filters a string cleaned and escaped for output in a textarea element.
 	 *
 	 * @since 3.1.0
 	 *
@@ -3602,7 +3978,7 @@ function esc_textarea( $text ) {
 function tag_escape( $tag_name ) {
 	$safe_tag = strtolower( preg_replace('/[^a-zA-Z0-9_:]/', '', $tag_name) );
 	/**
-	 * Filter a string cleaned and escaped for output as an HTML tag.
+	 * Filters a string cleaned and escaped for output as an HTML tag.
 	 *
 	 * @since 2.8.0
 	 *
@@ -3706,6 +4082,10 @@ function sanitize_option( $option, $value ) {
 		case 'blogdescription':
 		case 'blogname':
 			$value = $wpdb->strip_invalid_text_for_column( $wpdb->options, 'option_value', $value );
+			if ( $value !== $original_value ) {
+				$value = $wpdb->strip_invalid_text_for_column( $wpdb->options, 'option_value', wp_encode_emoji( $original_value ) );
+			}
+
 			if ( is_wp_error( $value ) ) {
 				$error = $value->get_error_message();
 			} else {
@@ -3841,6 +4221,14 @@ function sanitize_option( $option, $value ) {
 				$value = esc_url_raw( $value );
 				$value = str_replace( 'http://', '', $value );
 			}
+
+			if ( 'permalink_structure' === $option && '' !== $value && ! preg_match( '/%[^\/%]+%/', $value ) ) {
+				$error = sprintf(
+					/* translators: %s: Codex URL */
+					__( 'A structure tag is required when using custom permalinks. <a href="%s">Learn more</a>' ),
+					__( 'https://codex.wordpress.org/Using_Permalinks#Choosing_your_permalink_structure' )
+				);
+			}
 			break;
 
 		case 'default_role' :
@@ -3870,7 +4258,7 @@ function sanitize_option( $option, $value ) {
 	}
 
 	/**
-	 * Filter an option value following sanitization.
+	 * Filters an option value following sanitization.
 	 *
 	 * @since 2.3.0
 	 * @since 4.3.0 Added the `$original_value` parameter.
@@ -3913,8 +4301,8 @@ function map_deep( $value, $callback ) {
 /**
  * Parses a string into variables to be stored in an array.
  *
- * Uses {@link http://www.php.net/parse_str parse_str()} and stripslashes if
- * {@link http://www.php.net/magic_quotes magic_quotes_gpc} is on.
+ * Uses {@link https://secure.php.net/parse_str parse_str()} and stripslashes if
+ * {@link https://secure.php.net/magic_quotes magic_quotes_gpc} is on.
  *
  * @since 2.2.1
  *
@@ -3926,7 +4314,7 @@ function wp_parse_str( $string, &$array ) {
 	if ( get_magic_quotes_gpc() )
 		$array = stripslashes_deep( $array );
 	/**
-	 * Filter the array of variables derived from a parsed string.
+	 * Filters the array of variables derived from a parsed string.
 	 *
 	 * @since 2.3.0
 	 *
@@ -3967,7 +4355,7 @@ function wp_pre_kses_less_than_callback( $matches ) {
  * WordPress implementation of PHP sprintf() with filters.
  *
  * @since 2.5.0
- * @link http://www.php.net/sprintf
+ * @link https://secure.php.net/sprintf
  *
  * @param string $pattern   The string which formatted args are inserted.
  * @param mixed  $args ,... Arguments to be formatted into the $pattern string.
@@ -4011,7 +4399,7 @@ function wp_sprintf( $pattern ) {
 			}
 
 			/**
-			 * Filter a fragment from the pattern passed to wp_sprintf().
+			 * Filters a fragment from the pattern passed to wp_sprintf().
 			 *
 			 * If the fragment is unchanged, then sprintf() will be run on the fragment.
 			 *
@@ -4057,7 +4445,7 @@ function wp_sprintf_l( $pattern, $args ) {
 		return '';
 
 	/**
-	 * Filter the translated delimiters used by wp_sprintf_l().
+	 * Filters the translated delimiters used by wp_sprintf_l().
 	 * Placeholders (%s) are included to assist translators and then
 	 * removed before the array of strings reaches the filter.
 	 *
@@ -4244,18 +4632,21 @@ function wp_strip_all_tags($string, $remove_breaks = false) {
 }
 
 /**
- * Sanitize a string from user input or from the db
+ * Sanitizes a string from user input or from the database.
  *
- * check for invalid UTF-8,
- * Convert single < characters to entity,
- * strip all tags,
- * remove line breaks, tabs and extra white space,
- * strip octets.
+ * - Checks for invalid UTF-8,
+ * - Converts single `<` characters to entities
+ * - Strips all tags
+ * - Removes line breaks, tabs, and extra whitespace
+ * - Strips octets
  *
  * @since 2.9.0
  *
- * @param string $str
- * @return string
+ * @see wp_check_invalid_utf8()
+ * @see wp_strip_all_tags()
+ *
+ * @param string $str String to sanitize.
+ * @return string Sanitized string.
  */
 function sanitize_text_field( $str ) {
 	$filtered = wp_check_invalid_utf8( $str );
@@ -4280,7 +4671,7 @@ function sanitize_text_field( $str ) {
 	}
 
 	/**
-	 * Filter a sanitized text field string.
+	 * Filters a sanitized text field string.
 	 *
 	 * @since 2.9.0
 	 *
@@ -4342,7 +4733,7 @@ function capital_P_dangit( $text ) {
 function sanitize_mime_type( $mime_type ) {
 	$sani_mime_type = preg_replace( '/[^-+*.a-zA-Z0-9\/]/', '', $mime_type );
 	/**
-	 * Filter a mime type following sanitization.
+	 * Filters a mime type following sanitization.
 	 *
 	 * @since 3.1.3
 	 *
@@ -4369,7 +4760,7 @@ function sanitize_trackback_urls( $to_ping ) {
 	$urls_to_ping = array_map( 'esc_url_raw', $urls_to_ping );
 	$urls_to_ping = implode( "\n", $urls_to_ping );
 	/**
-	 * Filter a list of trackback URLs following sanitization.
+	 * Filters a list of trackback URLs following sanitization.
 	 *
 	 * The string returned here consists of a space or carriage return-delimited list
 	 * of trackback URLs.
@@ -4462,7 +4853,7 @@ function wp_spaces_regexp() {
 
 	if ( empty( $spaces ) ) {
 		/**
-		 * Filter the regexp for common whitespace characters.
+		 * Filters the regexp for common whitespace characters.
 		 *
 		 * This string is substituted for the \s sequence as needed in regular
 		 * expressions. For websites not written in English, different characters
@@ -4513,12 +4904,12 @@ img.emoji {
 }
 
 /**
+ * Print the inline Emoji detection script if it is not already printed.
  *
- * @global string $wp_version
+ * @since 4.2.0
  * @staticvar bool $printed
  */
 function print_emoji_detection_script() {
-	global $wp_version;
 	static $printed = false;
 
 	if ( $printed ) {
@@ -4527,24 +4918,57 @@ function print_emoji_detection_script() {
 
 	$printed = true;
 
+	_print_emoji_detection_script();
+}
+
+/**
+ * Prints inline Emoji dection script
+ *
+ * @ignore
+ * @since 4.6.0
+ * @access private
+ *
+ * @global string $wp_version WordPress version string.
+ */
+function _print_emoji_detection_script() {
+	global $wp_version;
+
 	$settings = array(
 		/**
-		 * Filter the URL where emoji images are hosted.
+		 * Filters the URL where emoji png images are hosted.
 		 *
 		 * @since 4.2.0
 		 *
-		 * @param string The emoji base URL.
+		 * @param string The emoji base URL for png images.
 		 */
-		'baseUrl' => apply_filters( 'emoji_url', 'https://s.w.org/images/core/emoji/72x72/' ),
+		'baseUrl' => apply_filters( 'emoji_url', 'https://s.w.org/images/core/emoji/2/72x72/' ),
 
 		/**
-		 * Filter the extension of the emoji files.
+		 * Filters the extension of the emoji png files.
 		 *
 		 * @since 4.2.0
 		 *
-		 * @param string The emoji extension. Default .png.
+		 * @param string The emoji extension for png files. Default .png.
 		 */
 		'ext' => apply_filters( 'emoji_ext', '.png' ),
+
+		/**
+		 * Filters the URL where emoji SVG images are hosted.
+		 *
+		 * @since 4.6.0
+		 *
+		 * @param string The emoji base URL for svg images.
+		 */
+		'svgUrl' => apply_filters( 'emoji_svg_url', 'https://s.w.org/images/core/emoji/2/svg/' ),
+
+		/**
+		 * Filters the extension of the emoji SVG files.
+		 *
+		 * @since 4.6.0
+		 *
+		 * @param string The emoji extension for svg files. Default .svg.
+		 */
+		'svgExt' => apply_filters( 'emoji_svg_ext', '.svg' ),
 	);
 
 	$version = 'ver=' . $wp_version;
@@ -4582,7 +5006,7 @@ function print_emoji_detection_script() {
 		?>
 		<script type="text/javascript">
 			window._wpemojiSettings = <?php echo wp_json_encode( $settings ); ?>;
-			!function(a,b,c){function d(a){var c,d,e,f=b.createElement("canvas"),g=f.getContext&&f.getContext("2d"),h=String.fromCharCode;if(!g||!g.fillText)return!1;switch(g.textBaseline="top",g.font="600 32px Arial",a){case"flag":return g.fillText(h(55356,56806,55356,56826),0,0),f.toDataURL().length>3e3;case"diversity":return g.fillText(h(55356,57221),0,0),c=g.getImageData(16,16,1,1).data,d=c[0]+","+c[1]+","+c[2]+","+c[3],g.fillText(h(55356,57221,55356,57343),0,0),c=g.getImageData(16,16,1,1).data,e=c[0]+","+c[1]+","+c[2]+","+c[3],d!==e;case"simple":return g.fillText(h(55357,56835),0,0),0!==g.getImageData(16,16,1,1).data[0];case"unicode8":return g.fillText(h(55356,57135),0,0),0!==g.getImageData(16,16,1,1).data[0]}return!1}function e(a){var c=b.createElement("script");c.src=a,c.type="text/javascript",b.getElementsByTagName("head")[0].appendChild(c)}var f,g,h,i;for(i=Array("simple","flag","unicode8","diversity"),c.supports={everything:!0,everythingExceptFlag:!0},h=0;h<i.length;h++)c.supports[i[h]]=d(i[h]),c.supports.everything=c.supports.everything&&c.supports[i[h]],"flag"!==i[h]&&(c.supports.everythingExceptFlag=c.supports.everythingExceptFlag&&c.supports[i[h]]);c.supports.everythingExceptFlag=c.supports.everythingExceptFlag&&!c.supports.flag,c.DOMReady=!1,c.readyCallback=function(){c.DOMReady=!0},c.supports.everything||(g=function(){c.readyCallback()},b.addEventListener?(b.addEventListener("DOMContentLoaded",g,!1),a.addEventListener("load",g,!1)):(a.attachEvent("onload",g),b.attachEvent("onreadystatechange",function(){"complete"===b.readyState&&c.readyCallback()})),f=c.source||{},f.concatemoji?e(f.concatemoji):f.wpemoji&&f.twemoji&&(e(f.twemoji),e(f.wpemoji)))}(window,document,window._wpemojiSettings);
+			!function(a,b,c){function d(a){var c,d,e,f,g,h=b.createElement("canvas"),i=h.getContext&&h.getContext("2d"),j=String.fromCharCode;if(!i||!i.fillText)return!1;switch(i.textBaseline="top",i.font="600 32px Arial",a){case"flag":return i.fillText(j(55356,56806,55356,56826),0,0),!(h.toDataURL().length<3e3)&&(i.clearRect(0,0,h.width,h.height),i.fillText(j(55356,57331,65039,8205,55356,57096),0,0),c=h.toDataURL(),i.clearRect(0,0,h.width,h.height),i.fillText(j(55356,57331,55356,57096),0,0),d=h.toDataURL(),c!==d);case"diversity":return i.fillText(j(55356,57221),0,0),e=i.getImageData(16,16,1,1).data,f=e[0]+","+e[1]+","+e[2]+","+e[3],i.fillText(j(55356,57221,55356,57343),0,0),e=i.getImageData(16,16,1,1).data,g=e[0]+","+e[1]+","+e[2]+","+e[3],f!==g;case"simple":return i.fillText(j(55357,56835),0,0),0!==i.getImageData(16,16,1,1).data[0];case"unicode8":return i.fillText(j(55356,57135),0,0),0!==i.getImageData(16,16,1,1).data[0];case"unicode9":return i.fillText(j(55358,56631),0,0),0!==i.getImageData(16,16,1,1).data[0]}return!1}function e(a){var c=b.createElement("script");c.src=a,c.type="text/javascript",b.getElementsByTagName("head")[0].appendChild(c)}var f,g,h,i;for(i=Array("simple","flag","unicode8","diversity","unicode9"),c.supports={everything:!0,everythingExceptFlag:!0},h=0;h<i.length;h++)c.supports[i[h]]=d(i[h]),c.supports.everything=c.supports.everything&&c.supports[i[h]],"flag"!==i[h]&&(c.supports.everythingExceptFlag=c.supports.everythingExceptFlag&&c.supports[i[h]]);c.supports.everythingExceptFlag=c.supports.everythingExceptFlag&&!c.supports.flag,c.DOMReady=!1,c.readyCallback=function(){c.DOMReady=!0},c.supports.everything||(g=function(){c.readyCallback()},b.addEventListener?(b.addEventListener("DOMContentLoaded",g,!1),a.addEventListener("load",g,!1)):(a.attachEvent("onload",g),b.attachEvent("onreadystatechange",function(){"complete"===b.readyState&&c.readyCallback()})),f=c.source||{},f.concatemoji?e(f.concatemoji):f.wpemoji&&f.twemoji&&(e(f.twemoji),e(f.wpemoji)))}(window,document,window._wpemojiSettings);
 		</script>
 		<?php
 	}
@@ -4647,7 +5071,7 @@ function wp_staticize_emoji( $text ) {
 	$text = wp_encode_emoji( $text );
 
 	/** This filter is documented in wp-includes/formatting.php */
-	$cdn_url = apply_filters( 'emoji_url', 'https://s.w.org/images/core/emoji/72x72/' );
+	$cdn_url = apply_filters( 'emoji_url', 'https://s.w.org/images/core/emoji/2/72x72/' );
 
 	/** This filter is documented in wp-includes/formatting.php */
 	$ext = apply_filters( 'emoji_ext', '.png' );
@@ -4803,3 +5227,68 @@ function url_shorten( $url, $length = 35 ) {
 	}
 	return $short_url;
 }
+
+/**
+ * Sanitizes a hex color.
+ *
+ * Returns either '', a 3 or 6 digit hex color (with #), or nothing.
+ * For sanitizing values without a #, see sanitize_hex_color_no_hash().
+ *
+ * @since 3.4.0
+ *
+ * @param string $color
+ * @return string|void
+ */
+function sanitize_hex_color( $color ) {
+	if ( '' === $color ) {
+		return '';
+	}
+
+	// 3 or 6 hex digits, or the empty string.
+	if ( preg_match('|^#([A-Fa-f0-9]{3}){1,2}$|', $color ) ) {
+		return $color;
+	}
+}
+
+/**
+ * Sanitizes a hex color without a hash. Use sanitize_hex_color() when possible.
+ *
+ * Saving hex colors without a hash puts the burden of adding the hash on the
+ * UI, which makes it difficult to use or upgrade to other color types such as
+ * rgba, hsl, rgb, and html color names.
+ *
+ * Returns either '', a 3 or 6 digit hex color (without a #), or null.
+ *
+ * @since 3.4.0
+ *
+ * @param string $color
+ * @return string|null
+ */
+function sanitize_hex_color_no_hash( $color ) {
+	$color = ltrim( $color, '#' );
+
+	if ( '' === $color ) {
+		return '';
+	}
+
+	return sanitize_hex_color( '#' . $color ) ? $color : null;
+}
+
+/**
+ * Ensures that any hex color is properly hashed.
+ * Otherwise, returns value untouched.
+ *
+ * This method should only be necessary if using sanitize_hex_color_no_hash().
+ *
+ * @since 3.4.0
+ *
+ * @param string $color
+ * @return string
+ */
+function maybe_hash_hex_color( $color ) {
+	if ( $unhashed = sanitize_hex_color_no_hash( $color ) ) {
+		return '#' . $unhashed;
+	}
+
+	return $color;
+}