get_shortcode_regex() WordPress Function
The get_shortcode_regex() function is used to search content for shortcodes and return the shortcodes and their attributes.
get_shortcode_regex( array $tagnames = null ) #
Retrieve the shortcode regular expression for searching.
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
- $tagnames
(array)(Optional) List of shortcodes to find. Defaults to all registered shortcodes.
Default value: null
Return
(string) The shortcode search regular expression
Source
File: wp-includes/shortcodes.php
259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 | function get_shortcode_regex( $tagnames = null ) { global $shortcode_tags; if ( empty( $tagnames ) ) { $tagnames = array_keys( $shortcode_tags ); } $tagregexp = implode( '|', 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
| Version | Description |
|---|---|
| 4.4.0 | Added the $tagnames parameter. |
| 2.5.0 | Introduced. |