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编辑：shortcodes.php

<?php
/**
 * WordPress API for creating bbcode-like tags or what WordPress calls
 * "shortcodes". The tag and attribute parsing or regular expression code is
 * based on the Textpattern tag parser.
 *
 * A few examples are below:
 *
 * [shortcode /]
 * [shortcode foo="bar" baz="bing" /]
 * [shortcode foo="bar"]content[/shortcode]
 *
 * Shortcode tags support attributes and enclosed content, but does not entirely
 * support inline shortcodes in other shortcodes. You will have to call the
 * shortcode parser in your function to account for that.
 *
 * {@internal
 * Please be aware that the above note was made during the beta of WordPress 2.6
 * and in the future may not be accurate. Please update the note when it is no
 * longer the case.}}
 *
 * To apply shortcode tags to content:
 *
 *     $out = do_shortcode( $content );
 *
 * @link https://developer.wordpress.org/plugins/shortcodes/
 *
 * @package WordPress
 * @subpackage Shortcodes
 * @since 2.5.0
 */

/**
 * Container for storing shortcode tags and their hook to call for the shortcode.
 *
 * @since 2.5.0
 *
 * @name $shortcode_tags
 * @var array
 * @global array $shortcode_tags
 */
$shortcode_tags = array();

/**
 * Adds a new shortcode.
 *
 * Care should be taken through prefixing or other means to ensure that the
 * shortcode tag being added is unique and will not conflict with other,
 * already-added shortcode tags. In the event of a duplicated tag, the tag
 * loaded last will take precedence.
 *
 * @since 2.5.0
 *
 * @global array $shortcode_tags
 *
 * @param string   $tag      Shortcode tag to be searched in post content.
 * @param callable $callback The callback function to run when the shortcode is found.
 *                           Every shortcode callback is passed three parameters by default,
 *                           including an array of attributes (`$atts`), the shortcode content
 *                           or null if not set (`$content`), and finally the shortcode tag
 *                           itself (`$shortcode_tag`), in that order.
 */
function add_shortcode( $tag, $callback ) {
	global $shortcode_tags;

if ( '' === trim( $tag ) ) {
		_doing_it_wrong(
			__FUNCTION__,
			__( 'Invalid shortcode name: Empty name given.' ),
			'4.4.0'
		);
		return;
	}

if ( 0 !== preg_match( '@[<>&/\[\]\x00-\x20=]@', $tag ) ) {
		_doing_it_wrong(
			__FUNCTION__,
			sprintf(
				/* translators: 1: Shortcode name, 2: Space-separated list of reserved characters. */
				__( 'Invalid shortcode name: %1$s. Do not use spaces or reserved characters: %2$s' ),
				$tag,
				'& / < > [ ] ='
			),
			'4.4.0'
		);
		return;
	}

$shortcode_tags[ $tag ] = $callback;
}

/**
 * Removes hook for shortcode.
 *
 * @since 2.5.0
 *
 * @global array $shortcode_tags
 *
 * @param string $tag Shortcode tag to remove hook for.
 */
function remove_shortcode( $tag ) {
	global $shortcode_tags;

unset( $shortcode_tags[ $tag ] );
}

/**
 * Clears all shortcodes.
 *
 * This function clears all of the shortcode tags by replacing the shortcodes global with
 * an empty array. This is actually an efficient method for removing all shortcodes.
 *
 * @since 2.5.0
 *
 * @global array $shortcode_tags
 */
function remove_all_shortcodes() {
	global $shortcode_tags;

$shortcode_tags = array();
}

/**
 * Determines whether a registered shortcode exists named $tag.
 *
 * @since 3.6.0
 *
 * @global array $shortcode_tags List of shortcode tags and their callback hooks.
 *
 * @param string $tag Shortcode tag to check.
 * @return bool Whether the given shortcode exists.
 */
function shortcode_exists( $tag ) {
	global $shortcode_tags;
	return array_key_exists( $tag, $shortcode_tags );
}

/**
 * Determines whether the passed content contains the specified shortcode.
 *
 * @since 3.6.0
 *
 * @global array $shortcode_tags
 *
 * @param string $content Content to search for shortcodes.
 * @param string $tag     Shortcode tag to check.
 * @return bool Whether the passed content contains the given shortcode.
 */
function has_shortcode( $content, $tag ) {
	if ( ! str_contains( $content, '[' ) ) {
		return false;
	}

if ( shortcode_exists( $tag ) ) {
		preg_match_all( '/' . get_shortcode_regex() . '/', $content, $matches, PREG_SET_ORDER );
		if ( empty( $matches ) ) {
			return false;
		}

foreach ( $matches as $shortcode ) {
			if ( $tag === $shortcode[2] ) {
				return true;
			} elseif ( ! empty( $shortcode[5] ) && has_shortcode( $shortcode[5], $tag ) ) {
				return true;
			}
		}
	}
	return false;
}

/**
 * Returns a list of registered shortcode names found in the given content.
 *
 * Example usage:
 *
 *     get_shortcode_tags_in_content( '[audio src="file.mp3"][/audio] [foo] [gallery ids="1,2,3"]' );
 *     // array( 'audio', 'gallery' )
 *
 * @since 6.3.2
 *
 * @param string $content The content to check.
 * @return string[] An array of registered shortcode names found in the content.
 */
function get_shortcode_tags_in_content( $content ) {
	if ( ! str_contains( $content, '[' ) ) {
		return array();
	}

preg_match_all( '/' . get_shortcode_regex() . '/', $content, $matches, PREG_SET_ORDER );
	if ( empty( $matches ) ) {
		return array();
	}

$tags = array();
	foreach ( $matches as $shortcode ) {
		$tags[] = $shortcode[2];

if ( ! empty( $shortcode[5] ) ) {
			$deep_tags = get_shortcode_tags_in_content( $shortcode[5] );
			if ( ! empty( $deep_tags ) ) {
				$tags = array_merge( $tags, $deep_tags );
			}
		}
	}

return $tags;
}

/**
 * Searches content for shortcodes and filter shortcodes through their hooks.
 *
 * This function is an alias for do_shortcode().
 *
 * @since 5.4.0
 *
 * @see do_shortcode()
 *
 * @param string $content     Content to search for shortcodes.
 * @param bool   $ignore_html When true, shortcodes inside HTML elements will be skipped.
 *                            Default false.
 * @return string Content with shortcodes filtered out.
 */
function apply_shortcodes( $content, $ignore_html = false ) {
	return do_shortcode( $content, $ignore_html );
}

/**
 * Searches content for shortcodes and filter shortcodes through their hooks.
 *
 * If there are no shortcode tags defined, then the content will be returned
 * without any filtering. This might cause issues when plugins are disabled but
 * the shortcode will still show up in the post or content.
 *
 * @since 2.5.0
 *
 * @global array $shortcode_tags List of shortcode tags and their callback hooks.
 *
 * @param string $content     Content to search for shortcodes.
 * @param bool   $ignore_html When true, shortcodes inside HTML elements will be skipped.
 *                            Default false.
 * @return string Content with shortcodes filtered out.
 */
function do_shortcode( $content, $ignore_html = false ) {
	global $shortcode_tags;

if ( ! str_contains( $content, '[' ) ) {
		return $content;
	}

if ( empty( $shortcode_tags ) || ! is_array( $shortcode_tags ) ) {
		return $content;
	}

// Find all registered tag names in $content.
	preg_match_all( '@\[([^<>&/\[\]\x00-\x20=]++)@', $content, $matches );
	$tagnames = array_intersect( array_keys( $shortcode_tags ), $matches[1] );

if ( empty( $tagnames ) ) {
		return $content;
	}

// Ensure this context is only added once if shortcodes are nested.
	$has_filter   = has_filter( 'wp_get_attachment_image_context', '_filter_do_shortcode_context' );
	$filter_added = false;

if ( ! $has_filter ) {
		$filter_added = add_filter( 'wp_get_attachment_image_context', '_filter_do_shortcode_context' );
	}

$content = do_shortcodes_in_html_tags( $content, $ignore_html, $tagnames );

$pattern = get_shortcode_regex( $tagnames );
	$content = preg_replace_callback( "/$pattern/", 'do_shortcode_tag', $content );

// Always restore square braces so we don't break things like <!--[if IE ]>.
	$content = unescape_invalid_shortcodes( $content );

// Only remove the filter if it was added in this scope.
	if ( $filter_added ) {
		remove_filter( 'wp_get_attachment_image_context', '_filter_do_shortcode_context' );
	}

return $content;
}

/**
 * Filter the `wp_get_attachment_image_context` hook during shortcode rendering.
 *
 * When wp_get_attachment_image() is called during shortcode rendering, we need to make clear
 * that the context is a shortcode and not part of the theme's template rendering logic.
 *
 * @since 6.3.0
 * @access private
 *
 * @return string The filtered context value for wp_get_attachment_images when doing shortcodes.
 */
function _filter_do_shortcode_context() {
	return 'do_shortcode';
}

/**
 * Retrieves 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 [[]]
 *
 * @since 2.5.0
 * @since 4.4.0 Added the `$tagnames` parameter.
 *
 * @global array $shortcode_tags
 *
 * @param array $tagnames Optional. List of shortcodes to find. Defaults to all registered shortcodes.
 * @return string The shortcode search regular expression.
 */
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 bracket for escaping shortcodes: [[tag]].
	// phpcs:enable
}

/**
 * Regular Expression callable for do_shortcode() for calling shortcode hook.
 *
 * @see get_shortcode_regex() for details of the match array contents.
 *
 * @since 2.5.0
 * @access private
 *
 * @global array $shortcode_tags
 *
 * @param array $m {
 *     Regular expression match array.
 *
 *     @type string $0 Entire matched shortcode text.
 *     @type string $1 Optional second opening bracket for escaping shortcodes.
 *     @type string $2 Shortcode name.
 *     @type string $3 Shortcode arguments list.
 *     @type string $4 Optional self closing slash.
 *     @type string $5 Content of a shortcode when it wraps some content.
 *     @type string $6 Optional second closing bracket for escaping shortcodes.
 * }
 * @return string Shortcode output.
 */
function do_shortcode_tag( $m ) {
	global $shortcode_tags;

// Allow [[foo]] syntax for escaping a tag.
	if ( '[' === $m[1] && ']' === $m[6] ) {
		return substr( $m[0], 1, -1 );
	}

$tag  = $m[2];
	$attr = shortcode_parse_atts( $m[3] );

if ( ! is_callable( $shortcode_tags[ $tag ] ) ) {
		_doing_it_wrong(
			__FUNCTION__,
			/* translators: %s: Shortcode tag. */
			sprintf( __( 'Attempting to parse a shortcode without a valid callback: %s' ), $tag ),
			'4.3.0'
		);
		return $m[0];
	}

/**
	 * Filters whether to call a shortcode callback.
	 *
	 * Returning a non-false value from filter will short-circuit the
	 * shortcode generation process, returning that value instead.
	 *
	 * @since 4.7.0
	 * @since 6.5.0 The `$attr` parameter is always an array.
	 *
	 * @param false|string $output Short-circuit return value. Either false or the value to replace the shortcode with.
	 * @param string       $tag    Shortcode name.
	 * @param array        $attr   Shortcode attributes array, can be empty if the original arguments string cannot be parsed.
	 * @param array        $m      Regular expression match array.
	 */
	$return = apply_filters( 'pre_do_shortcode_tag', false, $tag, $attr, $m );
	if ( false !== $return ) {
		return $return;
	}

$content = isset( $m[5] ) ? $m[5] : null;

$output = $m[1] . call_user_func( $shortcode_tags[ $tag ], $attr, $content, $tag ) . $m[6];

/**
	 * Filters the output created by a shortcode callback.
	 *
	 * @since 4.7.0
	 * @since 6.5.0 The `$attr` parameter is always an array.
	 *
	 * @param string $output Shortcode output.
	 * @param string $tag    Shortcode name.
	 * @param array  $attr   Shortcode attributes array, can be empty if the original arguments string cannot be parsed.
	 * @param array  $m      Regular expression match array.
	 */
	return apply_filters( 'do_shortcode_tag', $output, $tag, $attr, $m );
}

/**
 * Searches only inside HTML elements for shortcodes and process them.
 *
 * Any [ or ] characters remaining inside elements will be HTML encoded
 * to prevent interference with shortcodes that are outside the elements.
 * Assumes $content processed by KSES already.  Users with unfiltered_html
 * capability may get unexpected output if angle braces are nested in tags.
 *
 * @since 4.2.3
 *
 * @param string $content     Content to search for shortcodes.
 * @param bool   $ignore_html When true, all square braces inside elements will be encoded.
 * @param array  $tagnames    List of shortcodes to find.
 * @return string Content with shortcodes filtered out.
 */
function do_shortcodes_in_html_tags( $content, $ignore_html, $tagnames ) {
	// Normalize entities in unfiltered HTML before adding placeholders.
	$trans   = array(
		'&#91;' => '&#091;',
		'&#93;' => '&#093;',
	);
	$content = strtr( $content, $trans );
	$trans   = array(
		'[' => '&#91;',
		']' => '&#93;',
	);

$pattern = get_shortcode_regex( $tagnames );
	$textarr = wp_html_split( $content );

foreach ( $textarr as &$element ) {
		if ( '' === $element || '<' !== $element[0] ) {
			continue;
		}

$noopen  = ! str_contains( $element, '[' );
		$noclose = ! str_contains( $element, ']' );
		if ( $noopen || $noclose ) {
			// This element does not contain shortcodes.
			if ( $noopen xor $noclose ) {
				// Need to encode stray '[' or ']' chars.
				$element = strtr( $element, $trans );
			}
			continue;
		}

if ( $ignore_html || str_starts_with( $element, '<!--' ) || str_starts_with( $element, '<![CDATA[' ) ) {
			// Encode all '[' and ']' chars.
			$element = strtr( $element, $trans );
			continue;
		}

$attributes = wp_kses_attr_parse( $element );
		if ( false === $attributes ) {
			// Some plugins are doing things like [name] <[email]>.
			if ( 1 === preg_match( '%^<\s*\[\[?[^\[\]]+\]%', $element ) ) {
				$element = preg_replace_callback( "/$pattern/", 'do_shortcode_tag', $element );
			}

// Looks like we found some unexpected unfiltered HTML. Skipping it for confidence.
			$element = strtr( $element, $trans );
			continue;
		}

// Get element name.
		$front   = array_shift( $attributes );
		$back    = array_pop( $attributes );
		$matches = array();
		preg_match( '%[a-zA-Z0-9]+%', $front, $matches );
		$elname = $matches[0];

// Look for shortcodes in each attribute separately.
		foreach ( $attributes as &$attr ) {
			$open  = strpos( $attr, '[' );
			$close = strpos( $attr, ']' );
			if ( false === $open || false === $close ) {
				continue; // Go to next attribute. Square braces will be escaped at end of loop.
			}
			$double = strpos( $attr, '"' );
			$single = strpos( $attr, "'" );
			if ( ( false === $single || $open < $single ) && ( false === $double || $open < $double ) ) {
				/*
				 * $attr like '[shortcode]' or 'name = [shortcode]' implies unfiltered_html.
				 * In this specific situation we assume KSES did not run because the input
				 * was written by an administrator, so we should avoid changing the output
				 * and we do not need to run KSES here.
				 */
				$attr = preg_replace_callback( "/$pattern/", 'do_shortcode_tag', $attr );
			} else {
				/*
				 * $attr like 'name = "[shortcode]"' or "name = '[shortcode]'".
				 * We do not know if $content was unfiltered. Assume KSES ran before shortcodes.
				 */
				$count    = 0;
				$new_attr = preg_replace_callback( "/$pattern/", 'do_shortcode_tag', $attr, -1, $count );
				if ( $count > 0 ) {
					// Sanitize the shortcode output using KSES.
					$new_attr = wp_kses_one_attr( $new_attr, $elname );
					if ( '' !== trim( $new_attr ) ) {
						// The shortcode is safe to use now.
						$attr = $new_attr;
					}
				}
			}
		}
		$element = $front . implode( '', $attributes ) . $back;

// Now encode any remaining '[' or ']' chars.
		$element = strtr( $element, $trans );
	}

$content = implode( '', $textarr );

return $content;
}

/**
 * Removes placeholders added by do_shortcodes_in_html_tags().
 *
 * @since 4.2.3
 *
 * @param string $content Content to search for placeholders.
 * @return string Content with placeholders removed.
 */
function unescape_invalid_shortcodes( $content ) {
	// Clean up entire string, avoids re-parsing HTML.
	$trans = array(
		'&#91;' => '[',
		'&#93;' => ']',
	);

$content = strtr( $content, $trans );

return $content;
}

/**
 * Retrieves the shortcode attributes regex.
 *
 * @since 4.4.0
 *
 * @return string The shortcode attribute regular expression.
 */
function get_shortcode_atts_regex() {
	return '/([\w-]+)\s*=\s*"([^"]*)"(?:\s|$)|([\w-]+)\s*=\s*\'([^\']*)\'(?:\s|$)|([\w-]+)\s*=\s*([^\s\'"]+)(?:\s|$)|"([^"]*)"(?:\s|$)|\'([^\']*)\'(?:\s|$)|(\S+)(?:\s|$)/';
}

/**
 * Retrieves all attributes from the shortcodes tag.
 *
 * The attributes list has the attribute name as the key and the value of the
 * attribute as the value in the key/value pair. This allows for easier
 * retrieval of the attributes, since all attributes have to be known.
 *
 * @since 2.5.0
 * @since 6.5.0 The function now always returns an array,
 *              even if the original arguments string cannot be parsed or is empty.
 *
 * @param string $text Shortcode arguments list.
 * @return array Array of attribute values keyed by attribute name.
 *               Returns empty array if there are no attributes
 *               or if the original arguments string cannot be parsed.
 */
function shortcode_parse_atts( $text ) {
	$atts    = array();
	$pattern = get_shortcode_atts_regex();
	$text    = preg_replace( "/[\x{00a0}\x{200b}]+/u", ' ', $text );
	if ( preg_match_all( $pattern, $text, $match, PREG_SET_ORDER ) ) {
		foreach ( $match as $m ) {
			if ( ! empty( $m[1] ) ) {
				$atts[ strtolower( $m[1] ) ] = stripcslashes( $m[2] );
			} elseif ( ! empty( $m[3] ) ) {
				$atts[ strtolower( $m[3] ) ] = stripcslashes( $m[4] );
			} elseif ( ! empty( $m[5] ) ) {
				$atts[ strtolower( $m[5] ) ] = stripcslashes( $m[6] );
			} elseif ( isset( $m[7] ) && strlen( $m[7] ) ) {
				$atts[] = stripcslashes( $m[7] );
			} elseif ( isset( $m[8] ) && strlen( $m[8] ) ) {
				$atts[] = stripcslashes( $m[8] );
			} elseif ( isset( $m[9] ) ) {
				$atts[] = stripcslashes( $m[9] );
			}
		}

// Reject any unclosed HTML elements.
		foreach ( $atts as &$value ) {
			if ( str_contains( $value, '<' ) ) {
				if ( 1 !== preg_match( '/^[^<]*+(?:<[^>]*+>[^<]*+)*+$/', $value ) ) {
					$value = '';
				}
			}
		}
	}

return $atts;
}

/**
 * Combines user attributes with known attributes and fill in defaults when needed.
 *
 * The pairs should be considered to be all of the attributes which are
 * supported by the caller and given as a list. The returned attributes will
 * only contain the attributes in the $pairs list.
 *
 * If the $atts list has unsupported attributes, then they will be ignored and
 * removed from the final returned list.
 *
 * @since 2.5.0
 *
 * @param array  $pairs     Entire list of supported attributes and their defaults.
 * @param array  $atts      User defined attributes in shortcode tag.
 * @param string $shortcode Optional. The name of the shortcode, provided for context to enable filtering
 * @return array Combined and filtered attribute list.
 */
function shortcode_atts( $pairs, $atts, $shortcode = '' ) {
	$atts = (array) $atts;
	$out  = array();
	foreach ( $pairs as $name => $default ) {
		if ( array_key_exists( $name, $atts ) ) {
			$out[ $name ] = $atts[ $name ];
		} else {
			$out[ $name ] = $default;
		}
	}

if ( $shortcode ) {
		/**
		 * Filters shortcode attributes.
		 *
		 * If the third parameter of the shortcode_atts() function is present then this filter is available.
		 * The third parameter, $shortcode, is the name of the shortcode.
		 *
		 * @since 3.6.0
		 * @since 4.4.0 Added the `$shortcode` parameter.
		 *
		 * @param array  $out       The output array of shortcode attributes.
		 * @param array  $pairs     The supported attributes and their defaults.
		 * @param array  $atts      The user defined shortcode attributes.
		 * @param string $shortcode The shortcode name.
		 */
		$out = apply_filters( "shortcode_atts_{$shortcode}", $out, $pairs, $atts, $shortcode );
	}

return $out;
}

/**
 * Removes all shortcode tags from the given content.
 *
 * @since 2.5.0
 *
 * @global array $shortcode_tags
 *
 * @param string $content Content to remove shortcode tags.
 * @return string Content without shortcode tags.
 */
function strip_shortcodes( $content ) {
	global $shortcode_tags;

if ( ! str_contains( $content, '[' ) ) {
		return $content;
	}

if ( empty( $shortcode_tags ) || ! is_array( $shortcode_tags ) ) {
		return $content;
	}

// Find all registered tag names in $content.
	preg_match_all( '@\[([^<>&/\[\]\x00-\x20=]++)@', $content, $matches );

$tags_to_remove = array_keys( $shortcode_tags );

/**
	 * Filters the list of shortcode tags to remove from the content.
	 *
	 * @since 4.7.0
	 *
	 * @param array  $tags_to_remove Array of shortcode tags to remove.
	 * @param string $content        Content shortcodes are being removed from.
	 */
	$tags_to_remove = apply_filters( 'strip_shortcodes_tagnames', $tags_to_remove, $content );

$tagnames = array_intersect( $tags_to_remove, $matches[1] );

if ( empty( $tagnames ) ) {
		return $content;
	}

$content = do_shortcodes_in_html_tags( $content, true, $tagnames );

$pattern = get_shortcode_regex( $tagnames );
	$content = preg_replace_callback( "/$pattern/", 'strip_shortcode_tag', $content );

// Always restore square braces so we don't break things like <!--[if IE ]>.
	$content = unescape_invalid_shortcodes( $content );

return $content;
}

/**
 * Strips a shortcode tag based on RegEx matches against post content.
 *
 * @since 3.3.0
 *
 * @param array $m RegEx matches against post content.
 * @return string|false The content stripped of the tag, otherwise false.
 */
function strip_shortcode_tag( $m ) {
	// Allow [[foo]] syntax for escaping a tag.
	if ( '[' === $m[1] && ']' === $m[6] ) {
		return substr( $m[0], 1, -1 );
	}

return $m[1] . $m[6];
}

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ID3	drwxr-xr-x	-	2025-07-06 02:11	删除
IXR	drwxr-xr-x	-	2025-07-18 20:29	删除
PHPMailer	drwxr-xr-x	-	2026-01-29 20:52	删除
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php-compat	drwxr-xr-x	-	2025-07-06 02:11	删除
pomo	drwxr-xr-x	-	2025-07-06 02:11	删除
rest-api	drwxr-xr-x	-	2025-12-21 04:21	删除
sitemaps	drwxr-xr-x	-	2025-07-06 02:11	删除
sodium_compat	drwxr-xr-x	-	2025-07-06 02:11	删除
style-engine	drwxr-xr-x	-	2025-07-06 02:11	删除
theme-compat	drwxr-xr-x	-	2026-05-13 12:01	删除
widgets	drwxr-xr-x	-	2025-12-21 04:21	删除
abilities-api.php	-rw-r--r--	23.8 KB	2025-12-03 02:17	编辑下载删除
admin-bar.php	-rw-r--r--	36.1 KB	2025-12-03 02:17	编辑下载删除
atomlib.php	-rw-r--r--	11.9 KB	2025-12-03 02:17	编辑下载删除
block-bindings.php	-rw-r--r--	7.35 KB	2025-12-03 02:17	编辑下载删除
block-i18n.json	-rw-r--r--	316 B	2021-08-11 13:08	编辑下载删除
block-template-utils.php	-rw-r--r--	61.02 KB	2025-12-03 02:17	编辑下载删除
block-template.php	-rw-r--r--	15 KB	2025-12-03 02:17	编辑下载删除
blocks.php	-rw-r--r--	112.05 KB	2025-12-03 02:17	编辑下载删除
canonical.php	-rw-r--r--	33.83 KB	2025-12-03 02:17	编辑下载删除
capabilities.php	-rw-r--r--	42.63 KB	2026-02-04 02:17	编辑下载删除
class-IXR.php	-rw-r--r--	2.55 KB	2025-01-23 00:48	编辑下载删除
class-avif-info.php	-rw-r--r--	28.92 KB	2024-04-26 19:02	编辑下载删除
class-feed.php	-rw-r--r--	539 B	2024-10-01 02:50	编辑下载删除
class-json.php	-rw-r--r--	42.65 KB	2025-12-03 02:17	编辑下载删除
class-phpass.php	-rw-r--r--	6.61 KB	2024-09-18 01:08	编辑下载删除
class-requests.php	-rw-r--r--	2.18 KB	2023-04-05 17:12	编辑下载删除
class-simplepie.php	-rw-r--r--	453 B	2024-10-01 02:50	编辑下载删除
class-walker-category-dropdown.php	-rw-r--r--	2.41 KB	2023-09-14 16:46	编辑下载删除
class-walker-nav-menu.php	-rw-r--r--	11.76 KB	2025-01-22 02:26	编辑下载删除
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class-wp-ajax-response.php	-rw-r--r--	5.14 KB	2022-09-12 19:47	编辑下载删除
class-wp-application-passwords.php	-rw-r--r--	16.7 KB	2025-04-03 18:38	编辑下载删除
class-wp-block-editor-context.php	-rw-r--r--	1.32 KB	2022-09-12 19:47	编辑下载删除
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class-wp-block-metadata-registry.php	-rw-r--r--	11.62 KB	2025-03-06 03:17	编辑下载删除
class-wp-block-pattern-categories-registry.php	-rw-r--r--	5.32 KB	2025-12-03 02:17	编辑下载删除
class-wp-block-patterns-registry.php	-rw-r--r--	10.99 KB	2026-03-11 02:16	编辑下载删除
class-wp-block-styles-registry.php	-rw-r--r--	6.34 KB	2025-12-03 02:17	编辑下载删除
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class-wp-block-templates-registry.php	-rw-r--r--	7.02 KB	2025-12-03 02:17	编辑下载删除
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class-wp-classic-to-block-menu-converter.php	-rw-r--r--	3.97 KB	2025-12-03 02:17	编辑下载删除
class-wp-comment.php	-rw-r--r--	9.22 KB	2025-02-11 18:40	编辑下载删除
class-wp-customize-manager.php	-rw-r--r--	198.38 KB	2025-12-03 02:17	编辑下载删除
class-wp-customize-panel.php	-rw-r--r--	10.46 KB	2025-01-23 00:48	编辑下载删除
class-wp-date-query.php	-rw-r--r--	35.3 KB	2025-12-03 02:17	编辑下载删除
class-wp-dependencies.php	-rw-r--r--	16.61 KB	2026-02-04 02:17	编辑下载删除
class-wp-duotone.php	-rw-r--r--	39.83 KB	2024-06-14 16:18	编辑下载删除
class-wp-exception.php	-rw-r--r--	253 B	2024-09-27 23:28	编辑下载删除
class-wp-feed-cache-transient.php	-rw-r--r--	3.23 KB	2025-12-03 02:17	编辑下载删除
class-wp-http-ixr-client.php	-rw-r--r--	3.42 KB	2026-03-11 02:16	编辑下载删除
class-wp-http-requests-response.php	-rw-r--r--	4.3 KB	2023-10-11 11:05	编辑下载删除
class-wp-list-util.php	-rw-r--r--	7.27 KB	2024-02-28 03:38	编辑下载删除
class-wp-locale-switcher.php	-rw-r--r--	6.62 KB	2025-12-03 02:17	编辑下载删除
class-wp-matchesmapregex.php	-rw-r--r--	1.79 KB	2024-02-06 06:25	编辑下载删除
class-wp-network.php	-rw-r--r--	12.01 KB	2024-09-14 02:12	编辑下载删除
class-wp-oembed.php	-rw-r--r--	30.93 KB	2025-12-03 02:17	编辑下载删除
class-wp-paused-extensions-storage.php	-rw-r--r--	4.99 KB	2024-09-03 22:19	编辑下载删除
class-wp-post-type.php	-rw-r--r--	29.96 KB	2025-02-09 16:09	编辑下载删除
class-wp-recovery-mode-cookie-service.php	-rw-r--r--	6.72 KB	2022-10-04 07:59	编辑下载删除
class-wp-recovery-mode-email-service.php	-rw-r--r--	10.92 KB	2023-05-02 19:45	编辑下载删除
class-wp-recovery-mode-key-service.php	-rw-r--r--	4.77 KB	2025-02-17 16:24	编辑下载删除
class-wp-recovery-mode-link-service.php	-rw-r--r--	3.38 KB	2022-09-12 19:47	编辑下载删除
class-wp-recovery-mode.php	-rw-r--r--	11.18 KB	2025-02-23 16:11	编辑下载删除
class-wp-rewrite.php	-rw-r--r--	62.19 KB	2025-12-03 02:17	编辑下载删除
class-wp-script-modules.php	-rw-r--r--	32.15 KB	2026-02-04 02:17	编辑下载删除
class-wp-simplepie-file.php	-rw-r--r--	3.47 KB	2025-12-03 02:17	编辑下载删除
class-wp-simplepie-sanitize-kses.php	-rw-r--r--	1.87 KB	2025-01-23 00:48	编辑下载删除
class-wp-styles.php	-rw-r--r--	12.54 KB	2026-02-04 02:17	编辑下载删除
class-wp-tax-query.php	-rw-r--r--	19.12 KB	2025-12-03 02:17	编辑下载删除
class-wp-term-query.php	-rw-r--r--	39.99 KB	2025-12-03 02:17	编辑下载删除
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class-wp-text-diff-renderer-inline.php	-rw-r--r--	979 B	2024-02-15 00:27	编辑下载删除
class-wp-text-diff-renderer-table.php	-rw-r--r--	18.44 KB	2025-01-23 00:48	编辑下载删除
class-wp-textdomain-registry.php	-rw-r--r--	10.24 KB	2024-11-20 07:50	编辑下载删除
class-wp-url-pattern-prefixer.php	-rw-r--r--	4.69 KB	2025-02-19 03:32	编辑下载删除
class-wp-user-meta-session-tokens.php	-rw-r--r--	2.94 KB	2025-12-03 02:17	编辑下载删除
class-wp-user-query.php	-rw-r--r--	43.13 KB	2025-12-03 02:17	编辑下载删除
class-wp-walker.php	-rw-r--r--	13.01 KB	2024-07-26 11:56	编辑下载删除
class-wp-widget.php	-rw-r--r--	18 KB	2024-11-02 19:01	编辑下载删除
class-wp.php	-rw-r--r--	25.86 KB	2025-12-03 02:17	编辑下载删除
class-wpdb.php	-rw-r--r--	115.85 KB	2025-12-03 02:17	编辑下载删除
class.wp-dependencies.php	-rw-r--r--	373 B	2022-09-20 18:17	编辑下载删除
class.wp-scripts.php	-rw-r--r--	343 B	2022-09-20 18:17	编辑下载删除
class.wp-styles.php	-rw-r--r--	338 B	2022-09-20 18:17	编辑下载删除
comment-template.php	-rw-r--r--	100.73 KB	2025-12-03 02:17	编辑下载删除
comment.php	-rw-r--r--	130.93 KB	2025-12-03 02:17	编辑下载删除
compat-utf8.php	-rw-r--r--	19.1 KB	2025-12-03 02:17	编辑下载删除
compat.php	-rw-r--r--	17.41 KB	2025-12-03 02:17	编辑下载删除
date.php	-rw-r--r--	400 B	2022-06-17 15:20	编辑下载删除
default-constants.php	-rw-r--r--	11.1 KB	2024-10-01 03:58	编辑下载删除
default-filters.php	-rw-r--r--	37.02 KB	2025-12-03 02:17	编辑下载删除
deprecated.php	-rw-r--r--	188.13 KB	2025-12-03 02:17	编辑下载删除
error-protection.php	-rw-r--r--	4.02 KB	2023-05-02 19:45	编辑下载删除
error_log	-rw-r--r--	564 B	2026-05-14 05:46	编辑下载删除
feed-atom-comments.php	-rw-r--r--	5.38 KB	2024-03-04 17:41	编辑下载删除
feed-atom.php	-rw-r--r--	3.05 KB	2025-01-23 00:48	编辑下载删除
feed-rdf.php	-rw-r--r--	2.61 KB	2020-01-29 05:45	编辑下载删除
feed-rss.php	-rw-r--r--	1.16 KB	2020-01-29 05:45	编辑下载删除
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feed.php	-rw-r--r--	24.6 KB	2026-02-04 02:17	编辑下载删除
formatting.php	-rw-r--r--	346.43 KB	2025-12-03 02:17	编辑下载删除
functions.php	-rw-r--r--	281.84 KB	2025-12-03 02:17	编辑下载删除
functions.wp-styles.php	-rw-r--r--	8.44 KB	2025-12-03 02:17	编辑下载删除
global-styles-and-settings.php	-rw-r--r--	20.71 KB	2025-12-03 02:17	编辑下载删除
l10n.php	-rw-r--r--	67.18 KB	2025-12-03 02:17	编辑下载删除
load.php	-rw-r--r--	55.19 KB	2025-12-03 02:17	编辑下载删除
media-template.php	-rw-r--r--	61.72 KB	2025-12-03 02:17	编辑下载删除
media.php	-rw-r--r--	216.06 KB	2026-03-11 02:16	编辑下载删除
ms-default-constants.php	-rw-r--r--	4.81 KB	2024-06-14 00:50	编辑下载删除
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ms-site.php	-rw-r--r--	40.74 KB	2025-12-03 02:17	编辑下载删除
post.php	-rw-r--r--	289.13 KB	2025-12-03 02:17	编辑下载删除
rest-api.php	-rw-r--r--	98.29 KB	2025-12-03 02:17	编辑下载删除
revision.php	-rw-r--r--	30.02 KB	2025-01-28 04:07	编辑下载删除
robots-template.php	-rw-r--r--	5.06 KB	2022-04-06 19:33	编辑下载删除
script-loader.php	-rw-r--r--	154.63 KB	2026-02-04 02:17	编辑下载删除
shortcodes.php	-rw-r--r--	23.49 KB	2025-12-03 02:17	编辑下载删除
spl-autoload-compat.php	-rw-r--r--	441 B	2020-11-12 16:17	编辑下载删除
style-engine.php	-rw-r--r--	7.39 KB	2024-05-03 08:47	编辑下载删除
template-loader.php	-rw-r--r--	4.17 KB	2026-03-11 02:16	编辑下载删除
template.php	-rw-r--r--	35.97 KB	2025-12-03 02:17	编辑下载删除
theme-i18n.json	-rw-r--r--	1.69 KB	2026-02-04 02:17	编辑下载删除
theme.php	-rw-r--r--	131.84 KB	2025-12-03 02:17	编辑下载删除
update.php	-rw-r--r--	37.45 KB	2025-12-03 02:17	编辑下载删除
user.php	-rw-r--r--	173.89 KB	2025-12-03 02:17	编辑下载删除
utf8.php	-rw-r--r--	7.09 KB	2025-12-03 02:17	编辑下载删除
version.php	-rw-r--r--	1.08 KB	2026-03-12 02:16	编辑下载删除
wp-db.php	-rw-r--r--	445 B	2022-07-22 02:45	编辑下载删除