A WordPress-centric search engine for devs and theme authors



get_shortcode_regex ›

Since2.5.0
Deprecatedn/a
get_shortcode_regex ( $tagnames = null )
Parameters:
  • (array) $tagnames Optional. List of shortcodes to find. Defaults to all registered shortcodes.
    Required: No
    Default: null
Returns:
  • (string) The shortcode search regular expression
Defined at:
Codex:
Change Log:
  • 4.4.0

Retrieve the shortcode regular expression for searching.

The regular expression combines the shortcode tags in the regular expression in a regex class.

The regular expression contains 6 different sub matches to help with parsing.

1 - An extra [ to allow for escaping shortcodes with double [[]] 2 - The shortcode name 3 - The shortcode argument list 4 - The self closing / 5 - The content of a shortcode when it wraps some content. 6 - An extra ] to allow for escaping shortcodes with double [[]]



Source

function get_shortcode_regex( $tagnames = null ) {
	global $shortcode_tags;

	if ( empty( $tagnames ) ) {
		$tagnames = array_keys( $shortcode_tags );
	}
	$tagregexp = join( '|', array_map( 'preg_quote', $tagnames ) );

	// WARNING! Do not change this regex without changing do_shortcode_tag() and strip_shortcode_tag()
	// Also, see shortcode_unautop() and shortcode.js.

	// phpcs:disable Squiz.Strings.ConcatenationSpacing.PaddingFound -- don't remove regex indentation
	return
		'\\['                                // Opening bracket
		. '(\\[?)'                           // 1: Optional second opening bracket for escaping shortcodes: [[tag]]
		. "($tagregexp)"                     // 2: Shortcode name
		. '(?![\\w-])'                       // Not followed by word character or hyphen
		. '('                                // 3: Unroll the loop: Inside the opening shortcode tag
		.     '[^\\]\\/]*'                   // Not a closing bracket or forward slash
		.     '(?:'
		.         '\\/(?!\\])'               // A forward slash not followed by a closing bracket
		.         '[^\\]\\/]*'               // Not a closing bracket or forward slash
		.     ')*?'
		. ')'
		. '(?:'
		.     '(\\/)'                        // 4: Self closing tag ...
		.     '\\]'                          // ... and closing bracket
		. '|'
		.     '\\]'                          // Closing bracket
		.     '(?:'
		.         '('                        // 5: Unroll the loop: Optionally, anything between the opening and closing shortcode tags
		.             '[^\\[]*+'             // Not an opening bracket
		.             '(?:'
		.                 '\\[(?!\\/\\2\\])' // An opening bracket not followed by the closing shortcode tag
		.                 '[^\\[]*+'         // Not an opening bracket
		.             ')*+'
		.         ')'
		.         '\\[\\/\\2\\]'             // Closing shortcode tag
		.     ')?'
		. ')'
		. '(\\]?)';                          // 6: Optional second closing brocket for escaping shortcodes: [[tag]]
	// phpcs:enable
}