WP_Customize_Custom_CSS_Setting::validate() WordPress Method

The WP_Customize_Custom_CSS_Setting::validate() method is used to validate the value of a Custom CSS setting. This setting is used to store CSS code that will be used to customize the appearance of a WordPress site. The validate() method ensures that the value of the Custom CSS setting is a valid CSS code.

WP_Customize_Custom_CSS_Setting::validate( string $value ) #

	public function validate( $value ) {
		// Restores the more descriptive, specific name for use within this method.
		$css = $value;

		$validity = new WP_Error();

		if ( preg_match( '#</?\w+#', $css ) ) {
			$validity->add( 'illegal_markup', __( 'Markup is not allowed in CSS.' ) );
		}

		if ( ! $validity->has_errors() ) {
			$validity = parent::validate( $css );
		}
		return $validity;
	}