- $tagnames = array_keys( $shortcode_tags );
- $tagregexp = join( '|', array_map( 'preg_quote', $tagnames ) );
- $tagregexp = "(?:$tagregexp)(?![\\w-])"; // Excerpt of get_shortcode_regex().
-
- $comment_regex =
- '!' // Start of comment, after the <.
- . '(?:' // Unroll the loop: Consume everything until --> is found.
- . '-(?!->)' // Dash not followed by end of comment.
- . '[^\-]*+' // Consume non-dashes.
- . ')*+' // Loop possessively.
- . '(?:-->)?'; // End of comment. If not found, match all input.
-
- $shortcode_regex =
- '\[' // Find start of shortcode.
- . '[\/\[]?' // Shortcodes may begin with [/ or [[
- . $tagregexp // Only match registered shortcodes, because performance.
- . '(?:'
- . '[^\[\]<>]+' // Shortcodes do not contain other shortcodes. Quantifier critical.
- . '|'
- . '<[^\[\]>]*>' // HTML elements permitted. Prevents matching ] before >.
- . ')*+' // Possessive critical.
- . '\]' // Find end of shortcode.
- . '\]?'; // Shortcodes may end with ]]
-
- $regex =
- '/(' // Capture the entire match.
- . '<' // Find start of element.
- . '(?(?=!--)' // Is this a comment?
- . $comment_regex // Find end of comment.
- . '|'
- . '[^>]*>' // Find end of element.
- . ')'
- . '|'
- . $shortcode_regex // Find shortcodes.
- . ')/s';
+ preg_match_all( '@\[/?([^<>&/\[\]\x00-\x20]++)@', $text, $matches );
+ $tagnames = array_intersect( array_keys( $shortcode_tags ), $matches[1] );
+ $found_shortcodes = ! empty( $tagnames );
+ $shortcode_regex = $found_shortcodes ? _get_wptexturize_shortcode_regex( $tagnames ) : '';
+ $regex = _get_wptexturize_split_regex( $shortcode_regex );