Definition:
function get_shortcode_regex() {}
Retrieve the shortcode regular expression for searching.
The regular expression combines the shortcode tags in the regular expression in a regex class.
Return values
returns:The shortcode search regular expression
Source code
function get_shortcode_regex() { global $shortcode_tags; $tagnames = array_keys($shortcode_tags); $tagregexp = join( '|', array_map('preg_quote', $tagnames) ); // WARNING! Do not change this regex without changing do_shortcode_tag() and strip_shortcode_tag() return '\\[' // Opening bracket . '(\\[?)' // 1: Optional second opening bracket for escaping shortcodes: [[tag]] . "($tagregexp)" // 2: Shortcode name . '\\b' // Word boundary . '(' // 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]] }
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