*
* $out = do_shortcode( $content );
*
- * @link http://codex.wordpress.org/Shortcode_API
+ * @link https://codex.wordpress.org/Shortcode_API
*
* @package WordPress
* @subpackage Shortcodes
*
* @uses $shortcode_tags
*
- * @param string $tag shortcode tag to remove hook for.
+ * @param string $tag Shortcode tag to remove hook for.
*/
function remove_shortcode($tag) {
global $shortcode_tags;
*
* @since 3.6.0
*
- * @global array $shortcode_tags
- * @param string $tag
- * @return boolean
+ * @global array $shortcode_tags List of shortcode tags and their callback hooks.
+ *
+ * @param string $tag Shortcode tag to check.
+ * @return bool Whether the given shortcode exists.
*/
function shortcode_exists( $tag ) {
global $shortcode_tags;
* @since 3.6.0
*
* @global array $shortcode_tags
- * @param string $tag
- * @return boolean
+ *
+ * @param string $content Content to search for shortcodes.
+ * @param string $tag Shortcode tag to check.
+ * @return bool Whether the passed content contains the given shortcode.
*/
function has_shortcode( $content, $tag ) {
if ( false === strpos( $content, '[' ) ) {
*
* @since 2.5.0
*
- * @uses $shortcode_tags
+ * @global array $shortcode_tags List of shortcode tags and their callback hooks.
*
- * @param string $content Content to search for shortcodes
+ * @param string $content Content to search for shortcodes.
+ * @param bool $ignore_html When true, shortcodes inside HTML elements will be skipped.
* @return string Content with shortcodes filtered out.
*/
-function do_shortcode($content) {
+function do_shortcode( $content, $ignore_html = false ) {
global $shortcode_tags;
if ( false === strpos( $content, '[' ) ) {
if (empty($shortcode_tags) || !is_array($shortcode_tags))
return $content;
+ $tagnames = array_keys($shortcode_tags);
+ $tagregexp = join( '|', array_map('preg_quote', $tagnames) );
+ $pattern = "/\\[($tagregexp)/s";
+
+ if ( 1 !== preg_match( $pattern, $content ) ) {
+ // Avoids parsing HTML when there are no shortcodes or embeds anyway.
+ return $content;
+ }
+
+ $content = do_shortcodes_in_html_tags( $content, $ignore_html );
+
$pattern = get_shortcode_regex();
- return preg_replace_callback( "/$pattern/s", 'do_shortcode_tag', $content );
+ $content = preg_replace_callback( "/$pattern/s", 'do_shortcode_tag', $content );
+
+ // Always restore square braces so we don't break things like <!--[if IE ]>
+ $content = unescape_invalid_shortcodes( $content );
+
+ return $content;
}
/**
}
}
+/**
+ * Search only inside HTML elements for shortcodes and process them.
+ *
+ * Any [ or ] characters remaining inside elements will be HTML encoded
+ * to prevent interference with shortcodes that are outside the elements.
+ * Assumes $content processed by KSES already. Users with unfiltered_html
+ * capability may get unexpected output if angle braces are nested in tags.
+ *
+ * @since 4.2.3
+ *
+ * @param string $content Content to search for shortcodes
+ * @param bool $ignore_html When true, all square braces inside elements will be encoded.
+ * @return string Content with shortcodes filtered out.
+ */
+function do_shortcodes_in_html_tags( $content, $ignore_html ) {
+ // Normalize entities in unfiltered HTML before adding placeholders.
+ $trans = array( '[' => '[', ']' => ']' );
+ $content = strtr( $content, $trans );
+ $trans = array( '[' => '[', ']' => ']' );
+
+ $pattern = get_shortcode_regex();
+ $textarr = wp_html_split( $content );
+
+ foreach ( $textarr as &$element ) {
+ if ( '' == $element || '<' !== $element[0] ) {
+ continue;
+ }
+
+ $noopen = false === strpos( $element, '[' );
+ $noclose = false === strpos( $element, ']' );
+ if ( $noopen || $noclose ) {
+ // This element does not contain shortcodes.
+ if ( $noopen xor $noclose ) {
+ // Need to encode stray [ or ] chars.
+ $element = strtr( $element, $trans );
+ }
+ continue;
+ }
+
+ if ( $ignore_html || '<!--' === substr( $element, 0, 4 ) || '<![CDATA[' === substr( $element, 0, 9 ) ) {
+ // Encode all [ and ] chars.
+ $element = strtr( $element, $trans );
+ continue;
+ }
+
+ $attributes = wp_kses_attr_parse( $element );
+ if ( false === $attributes ) {
+ // Some plugins are doing things like [name] <[email]>.
+ if ( 1 === preg_match( '%^<\s*\[\[?[^\[\]]+\]%', $element ) ) {
+ $element = preg_replace_callback( "/$pattern/s", 'do_shortcode_tag', $element );
+ }
+
+ // Looks like we found some crazy unfiltered HTML. Skipping it for sanity.
+ $element = strtr( $element, $trans );
+ continue;
+ }
+
+ // Get element name
+ $front = array_shift( $attributes );
+ $back = array_pop( $attributes );
+ $matches = array();
+ preg_match('%[a-zA-Z0-9]+%', $front, $matches);
+ $elname = $matches[0];
+
+ // Look for shortcodes in each attribute separately.
+ foreach ( $attributes as &$attr ) {
+ $open = strpos( $attr, '[' );
+ $close = strpos( $attr, ']' );
+ if ( false === $open || false === $close ) {
+ continue; // Go to next attribute. Square braces will be escaped at end of loop.
+ }
+ $double = strpos( $attr, '"' );
+ $single = strpos( $attr, "'" );
+ if ( ( false === $single || $open < $single ) && ( false === $double || $open < $double ) ) {
+ // $attr like '[shortcode]' or 'name = [shortcode]' implies unfiltered_html.
+ // In this specific situation we assume KSES did not run because the input
+ // was written by an administrator, so we should avoid changing the output
+ // and we do not need to run KSES here.
+ $attr = preg_replace_callback( "/$pattern/s", 'do_shortcode_tag', $attr );
+ } else {
+ // $attr like 'name = "[shortcode]"' or "name = '[shortcode]'"
+ // We do not know if $content was unfiltered. Assume KSES ran before shortcodes.
+ $count = 0;
+ $new_attr = preg_replace_callback( "/$pattern/s", 'do_shortcode_tag', $attr, -1, $count );
+ if ( $count > 0 ) {
+ // Sanitize the shortcode output using KSES.
+ $new_attr = wp_kses_one_attr( $new_attr, $elname );
+ if ( '' !== $new_attr ) {
+ // The shortcode is safe to use now.
+ $attr = $new_attr;
+ }
+ }
+ }
+ }
+ $element = $front . implode( '', $attributes ) . $back;
+
+ // Now encode any remaining [ or ] chars.
+ $element = strtr( $element, $trans );
+ }
+
+ $content = implode( '', $textarr );
+
+ return $content;
+}
+
+/**
+ * Remove placeholders added by do_shortcodes_in_html_tags().
+ *
+ * @since 4.2.3
+ *
+ * @param string $content Content to search for placeholders.
+ * @return string Content with placeholders removed.
+ */
+function unescape_invalid_shortcodes( $content ) {
+ // Clean up entire string, avoids re-parsing HTML.
+ $trans = array( '[' => '[', ']' => ']' );
+ $content = strtr( $content, $trans );
+
+ return $content;
+}
+
/**
* Retrieve all attributes from the shortcodes tag.
*
$atts[strtolower($m[3])] = stripcslashes($m[4]);
elseif (!empty($m[5]))
$atts[strtolower($m[5])] = stripcslashes($m[6]);
- elseif (isset($m[7]) and strlen($m[7]))
+ elseif (isset($m[7]) && strlen($m[7]))
$atts[] = stripcslashes($m[7]);
elseif (isset($m[8]))
$atts[] = stripcslashes($m[8]);
if (empty($shortcode_tags) || !is_array($shortcode_tags))
return $content;
+ $content = do_shortcodes_in_html_tags( $content, true );
+
$pattern = get_shortcode_regex();
+ $content = preg_replace_callback( "/$pattern/s", 'strip_shortcode_tag', $content );
- return preg_replace_callback( "/$pattern/s", 'strip_shortcode_tag', $content );
+ // Always restore square braces so we don't break things like <!--[if IE ]>
+ $content = unescape_invalid_shortcodes( $content );
+
+ return $content;
}
function strip_shortcode_tag( $m ) {
return $m[1] . $m[6];
}
-
-add_filter('the_content', 'do_shortcode', 11); // AFTER wpautop()