WP_Customize_Manager::_validate_external_header_video() WordPress Method

The WP_Customize_Manager::_validate_external_header_video() function is used to validate an external header video. This function is used when the 'external_header_video' setting is updated.

WP_Customize_Manager::_validate_external_header_video( WP_Error $validity, mixed $value ) #

	public function _validate_external_header_video( $validity, $value ) {
		$video = esc_url_raw( $value );
		if ( $video ) {
			if ( ! preg_match( '#^https?://(?:www\.)?(?:youtube\.com/watch|youtu\.be/)#', $video ) ) {
				$validity->add( 'invalid_url', __( 'Please enter a valid YouTube URL.' ) );
			}
		}
		return $validity;
	}