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&/\[\]\x00-\x20=]@', $tag ) ) {
/* translators: 1: Shortcode name, 2: Space-separated list of reserved characters. */
$message = sprintf( __( 'Invalid shortcode name: %1$s. Do not use spaces or reserved characters: %2$s' ), $tag, '& / < > [ ] =' );
_doing_it_wrong( __FUNCTION__, $message, '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 ] );
}
/**
* Clear all shortcodes.
*
* This function is simple, it clears all of the shortcode tags by replacing the
* shortcodes global by a empty array. This is actually a very efficient method
* for removing all shortcodes.
*
* @since 2.5.0
*
* @global array $shortcode_tags
*/
function remove_all_shortcodes() {
global $shortcode_tags;
$shortcode_tags = array();
}
/**
* 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 );
}
/**
* 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 ( false === strpos( $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;
}
/**
* Search 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.
* @return string Content with shortcodes filtered out.
*/
function do_shortcode( $content, $ignore_html = false ) {
global $shortcode_tags;
if ( false === strpos( $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;
}
$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