Summery Summery
Retrieve the shortcode regular expression for searching.
Syntax Syntax
Description Description
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 [[]]
Parameters Parameters
- $tagnames
-
(Optional) List of shortcodes to find. Defaults to all registered shortcodes.
Default value: null
Return Return
(string) The shortcode search regular expression
Source Source
File: wp-includes/shortcodes.php
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 }
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Changelog Changelog
Version | Description |
---|---|
4.4.0 | Added the $tagnames parameter. |
2.5.0 | Introduced. |