检索用于搜索的短代码正则表达式。

原型

get_shortcode_regex( array $tagnames = null )

描述

正则表达式将正则表达式中的短代码标记组合在一个正则表达式类中。

参数

$tagnames (array) (Optional)  要查找的短代码列表。默认为所有已注册的短代码。

返回值

(string)  短代码搜索正则表达式

源文件

路径:wp-includes/shortcodes.php

<?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.
	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]]
}
...
?>

其他

英文文档:https://developer.wordpress.org/reference/functions/get_shortcode_regex/