Searches content for shortcodes and filter shortcodes through their hooks.

Description

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.

Parameters

$contentstringrequired

Content to search for shortcodes.

$ignore_htmlbooloptional

When true, shortcodes inside HTML elements will be skipped.

Default:false

Return

More Information

If there are no shortcode tags defined, then the content will be returned without any filtering. This might cause issues if a plugin is disabled as its shortcode will still show up in the post or content.

Source

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;
}

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