}
if ( ! function_exists( 'mb_substr' ) ) :
+ /**
+ * Compat function to mimic mb_substr().
+ *
+ * @ignore
+ * @since 3.2.0
+ *
+ * @see _mb_substr()
+ *
+ * @param string $str The string to extract the substring from.
+ * @param int $start Position to being extraction from in `$str`.
+ * @param int|null $length Optional. Maximum number of characters to extract from `$str`.
+ * Default null.
+ * @param string|null $encoding Optional. Character encoding to use. Default null.
+ * @return string Extracted substring.
+ */
function mb_substr( $str, $start, $length = null, $encoding = null ) {
return _mb_substr( $str, $start, $length, $encoding );
}
endif;
-/*
+/**
+ * Internal compat function to mimic mb_substr().
+ *
* Only understands UTF-8 and 8bit. All other character sets will be treated as 8bit.
* For $encoding === UTF-8, the $str input is expected to be a valid UTF-8 byte sequence.
* The behavior of this function for invalid inputs is undefined.
+ *
+ * @ignore
+ * @since 3.2.0
+ *
+ * @param string $str The string to extract the substring from.
+ * @param int $start Position to being extraction from in `$str`.
+ * @param int|null $length Optional. Maximum number of characters to extract from `$str`.
+ * Default null.
+ * @param string|null $encoding Optional. Character encoding to use. Default null.
+ * @return string Extracted substring.
*/
function _mb_substr( $str, $start, $length = null, $encoding = null ) {
if ( null === $encoding ) {
$encoding = get_option( 'blog_charset' );
}
- // The solution below works only for UTF-8,
- // so in case of a different charset just use built-in substr()
+ /*
+ * The solution below works only for UTF-8, so in case of a different
+ * charset just use built-in substr().
+ */
if ( ! in_array( $encoding, array( 'utf8', 'utf-8', 'UTF8', 'UTF-8' ) ) ) {
return is_null( $length ) ? substr( $str, $start ) : substr( $str, $start, $length );
}
if ( _wp_can_use_pcre_u() ) {
- // Use the regex unicode support to separate the UTF-8 characters into an array
+ // Use the regex unicode support to separate the UTF-8 characters into an array.
preg_match_all( '/./us', $str, $match );
$chars = is_null( $length ) ? array_slice( $match[0], $start ) : array_slice( $match[0], $start, $length );
return implode( '', $chars );
| \xF4[\x80-\x8F][\x80-\xBF]{2}
)/x';
- $chars = array( '' ); // Start with 1 element instead of 0 since the first thing we do is pop
+ // Start with 1 element instead of 0 since the first thing we do is pop.
+ $chars = array( '' );
do {
// We had some string left over from the last round, but we counted it in that last round.
array_pop( $chars );
- // Split by UTF-8 character, limit to 1000 characters (last array element will contain the rest of the string)
+ /*
+ * Split by UTF-8 character, limit to 1000 characters (last array element will contain
+ * the rest of the string).
+ */
$pieces = preg_split( $regex, $str, 1000, PREG_SPLIT_DELIM_CAPTURE | PREG_SPLIT_NO_EMPTY );
$chars = array_merge( $chars, $pieces );
- } while ( count( $pieces ) > 1 && $str = array_pop( $pieces ) ); // If there's anything left over, repeat the loop.
+
+ // If there's anything left over, repeat the loop.
+ } while ( count( $pieces ) > 1 && $str = array_pop( $pieces ) );
return join( '', array_slice( $chars, $start, $length ) );
}
if ( ! function_exists( 'mb_strlen' ) ) :
+ /**
+ * Compat function to mimic mb_strlen().
+ *
+ * @ignore
+ * @since 4.2.0
+ *
+ * @see _mb_strlen()
+ *
+ * @param string $str The string to retrieve the character length from.
+ * @param string|null $encoding Optional. Character encoding to use. Default null.
+ * @return int String length of `$str`.
+ */
function mb_strlen( $str, $encoding = null ) {
return _mb_strlen( $str, $encoding );
}
endif;
-/*
+/**
+ * Internal compat function to mimic mb_strlen().
+ *
* Only understands UTF-8 and 8bit. All other character sets will be treated as 8bit.
- * For $encoding === UTF-8, the $str input is expected to be a valid UTF-8 byte sequence.
- * The behavior of this function for invalid inputs is undefined.
+ * For $encoding === UTF-8, the `$str` input is expected to be a valid UTF-8 byte
+ * sequence. The behavior of this function for invalid inputs is undefined.
+ *
+ * @ignore
+ * @since 4.2.0
+ *
+ * @param string $str The string to retrieve the character length from.
+ * @param string|null $encoding Optional. Character encoding to use. Default null.
+ * @return int String length of `$str`.
*/
function _mb_strlen( $str, $encoding = null ) {
if ( null === $encoding ) {
$encoding = get_option( 'blog_charset' );
}
- // The solution below works only for UTF-8,
- // so in case of a different charset just use built-in strlen()
+ /*
+ * The solution below works only for UTF-8, so in case of a different charset
+ * just use built-in strlen().
+ */
if ( ! in_array( $encoding, array( 'utf8', 'utf-8', 'UTF8', 'UTF-8' ) ) ) {
return strlen( $str );
}
if ( _wp_can_use_pcre_u() ) {
- // Use the regex unicode support to separate the UTF-8 characters into an array
+ // Use the regex unicode support to separate the UTF-8 characters into an array.
preg_match_all( '/./us', $str, $match );
return count( $match[0] );
}
| \xF4[\x80-\x8F][\x80-\xBF]{2}
)/x';
- $count = 1; // Start at 1 instead of 0 since the first thing we do is decrement
+ // Start at 1 instead of 0 since the first thing we do is decrement.
+ $count = 1;
do {
// We had some string left over from the last round, but we counted it in that last round.
$count--;
- // Split by UTF-8 character, limit to 1000 characters (last array element will contain the rest of the string)
+ /*
+ * Split by UTF-8 character, limit to 1000 characters (last array element will contain
+ * the rest of the string).
+ */
$pieces = preg_split( $regex, $str, 1000 );
- // Increment
+ // Increment.
$count += count( $pieces );
- } while ( $str = array_pop( $pieces ) ); // If there's anything left over, repeat the loop.
- // Fencepost: preg_split() always returns one extra item in the array
+ // If there's anything left over, repeat the loop.
+ } while ( $str = array_pop( $pieces ) );
+
+ // Fencepost: preg_split() always returns one extra item in the array.
return --$count;
}
if ( !function_exists('hash_hmac') ):
+/**
+ * Compat function to mimic hash_hmac().
+ *
+ * @ignore
+ * @since 3.2.0
+ *
+ * @see _hash_hmac()
+ *
+ * @param string $algo Hash algorithm. Accepts 'md5' or 'sha1'.
+ * @param string $data Data to be hashed.
+ * @param string $key Secret key to use for generating the hash.
+ * @param bool $raw_output Optional. Whether to output raw binary data (true),
+ * or lowercase hexits (false). Default false.
+ * @return string|false The hash in output determined by `$raw_output`. False if `$algo`
+ * is unknown or invalid.
+ */
function hash_hmac($algo, $data, $key, $raw_output = false) {
return _hash_hmac($algo, $data, $key, $raw_output);
}
endif;
+/**
+ * Internal compat function to mimic hash_hmac().
+ *
+ * @ignore
+ * @since 3.2.0
+ *
+ * @param string $algo Hash algorithm. Accepts 'md5' or 'sha1'.
+ * @param string $data Data to be hashed.
+ * @param string $key Secret key to use for generating the hash.
+ * @param bool $raw_output Optional. Whether to output raw binary data (true),
+ * or lowercase hexits (false). Default false.
+ * @return string|false The hash in output determined by `$raw_output`. False if `$algo`
+ * is unknown or invalid.
+ */
function _hash_hmac($algo, $data, $key, $raw_output = false) {
$packs = array('md5' => 'H32', 'sha1' => 'H40');
if ( ! function_exists( 'hash_equals' ) ) :
/**
- * Compare two strings in constant time.
+ * Timing attack safe string comparison
+ *
+ * Compares two strings using the same time whether they're equal or not.
*
* This function was added in PHP 5.6.
- * It can leak the length of a string.
+ *
+ * Note: It can leak the length of a string when arguments of differing length are supplied.
*
* @since 3.9.2
*
* @param string $a Expected string.
- * @param string $b Actual string.
+ * @param string $b Actual, user supplied, string.
* @return bool Whether strings are equal.
*/
function hash_equals( $a, $b ) {
*
* Compatibility shim for PHP <5.4
*
- * @link http://php.net/jsonserializable
+ * @link https://secure.php.net/jsonserializable
*
* @since 4.4.0
*/
if ( ! function_exists( 'random_int' ) ) {
require ABSPATH . WPINC . '/random_compat/random.php';
}
+
+if ( ! function_exists( 'array_replace_recursive' ) ) :
+ /**
+ * PHP-agnostic version of {@link array_replace_recursive()}.
+ *
+ * The array_replace_recursive() function is a PHP 5.3 function. WordPress
+ * currently supports down to PHP 5.2, so this method is a workaround
+ * for PHP 5.2.
+ *
+ * Note: array_replace_recursive() supports infinite arguments, but for our use-
+ * case, we only need to support two arguments.
+ *
+ * Subject to removal once WordPress makes PHP 5.3.0 the minimum requirement.
+ *
+ * @since 4.5.3
+ *
+ * @see https://secure.php.net/manual/en/function.array-replace-recursive.php#109390
+ *
+ * @param array $base Array with keys needing to be replaced.
+ * @param array $replacements Array with the replaced keys.
+ *
+ * @return array
+ */
+ function array_replace_recursive( $base = array(), $replacements = array() ) {
+ foreach ( array_slice( func_get_args(), 1 ) as $replacements ) {
+ $bref_stack = array( &$base );
+ $head_stack = array( $replacements );
+
+ do {
+ end( $bref_stack );
+
+ $bref = &$bref_stack[ key( $bref_stack ) ];
+ $head = array_pop( $head_stack );
+
+ unset( $bref_stack[ key( $bref_stack ) ] );
+
+ foreach ( array_keys( $head ) as $key ) {
+ if ( isset( $key, $bref ) &&
+ isset( $bref[ $key ] ) && is_array( $bref[ $key ] ) &&
+ isset( $head[ $key ] ) && is_array( $head[ $key ] )
+ ) {
+ $bref_stack[] = &$bref[ $key ];
+ $head_stack[] = $head[ $key ];
+ } else {
+ $bref[ $key ] = $head[ $key ];
+ }
+ }
+ } while ( count( $head_stack ) );
+ }
+
+ return $base;
+ }
+endif;
+
+// SPL can be disabled on PHP 5.2
+if ( ! function_exists( 'spl_autoload_register' ) ):
+ $_wp_spl_autoloaders = array();
+
+ /**
+ * Autoloader compatibility callback.
+ *
+ * @since 4.6.0
+ *
+ * @param string $classname Class to attempt autoloading.
+ */
+ function __autoload( $classname ) {
+ global $_wp_spl_autoloaders;
+ foreach ( $_wp_spl_autoloaders as $autoloader ) {
+ if ( ! is_callable( $autoloader ) ) {
+ // Avoid the extra warning if the autoloader isn't callable.
+ continue;
+ }
+
+ call_user_func( $autoloader, $classname );
+
+ // If it has been autoloaded, stop processing.
+ if ( class_exists( $classname, false ) ) {
+ return;
+ }
+ }
+ }
+
+ /**
+ * Registers a function to be autoloaded.
+ *
+ * @since 4.6.0
+ *
+ * @param callable $autoload_function The function to register.
+ * @param bool $throw Optional. Whether the function should throw an exception
+ * if the function isn't callable. Default true.
+ * @param bool $prepend Whether the function should be prepended to the stack.
+ * Default false.
+ */
+ function spl_autoload_register( $autoload_function, $throw = true, $prepend = false ) {
+ if ( $throw && ! is_callable( $autoload_function ) ) {
+ // String not translated to match PHP core.
+ throw new Exception( 'Function not callable' );
+ }
+
+ global $_wp_spl_autoloaders;
+
+ // Don't allow multiple registration.
+ if ( in_array( $autoload_function, $_wp_spl_autoloaders ) ) {
+ return;
+ }
+
+ if ( $prepend ) {
+ array_unshift( $_wp_spl_autoloaders, $autoload_function );
+ } else {
+ $_wp_spl_autoloaders[] = $autoload_function;
+ }
+ }
+
+ /**
+ * Unregisters an autoloader function.
+ *
+ * @since 4.6.0
+ *
+ * @param callable $function The function to unregister.
+ * @return bool True if the function was unregistered, false if it could not be.
+ */
+ function spl_autoload_unregister( $function ) {
+ global $_wp_spl_autoloaders;
+ foreach ( $_wp_spl_autoloaders as &$autoloader ) {
+ if ( $autoloader === $function ) {
+ unset( $autoloader );
+ return true;
+ }
+ }
+
+ return false;
+ }
+
+ /**
+ * Retrieves the registered autoloader functions.
+ *
+ * @since 4.6.0
+ *
+ * @return array List of autoloader functions.
+ */
+ function spl_autoload_functions() {
+ return $GLOBALS['_wp_spl_autoloaders'];
+ }
+endif;
scripts.mit.edu / autoinstalls / wordpress.git / blobdiff