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/** * 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://codex.wordpress.org/Shortcode_API * * @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(); /** * Add hook for shortcode tag. * * There can only be one hook for each shortcode. Which means that if another * plugin has a similar shortcode, it will override yours or yours will override * theirs depending on which order the plugins are included and/or ran. * * Simplest example of a shortcode tag using the API: * * // [footag foo="bar"] * function footag_func( $atts ) { * return "foo = { * $atts[foo] * }"; * } * add_shortcode( 'footag', 'footag_func' ); * * Example with nice attribute defaults: * * // [bartag foo="bar"] * function bartag_func( $atts ) { * $args = shortcode_atts( array( * 'foo' => 'no foo', * 'baz' => 'default baz', * ), $atts ); * * return "foo = {$args['foo']}"; * } * add_shortcode( 'bartag', 'bartag_func' ); * * Example with enclosed content: * * // [baztag]content[/baztag] * function baztag_func( $atts, $content = '' ) { * return "content = $content"; * } * add_shortcode( 'baztag', 'baztag_func' ); * * @since 2.5.0 * * @global array $shortcode_tags * * @param string $tag Shortcode tag to be searched in post content. * @param callable $func Hook to run when shortcode is found. */ function add_shortcode($tag, $func) { global $shortcode_tags; if ( '' == trim( $tag ) ) { $message = __( 'Invalid shortcode name: Empty name given.' ); _doing_it_wrong( __FUNCTION__, $message, '4.4.0' ); return; } if ( 0 !== preg_match( '@[<>&/\[\]\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 ] = $func; } /** * 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( (string) $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