= 8.1 results in a fatal error. * * @package WordPress * @since 5.9.0 */ /** * Outputs the HTML readonly attribute. * * Compares the first two arguments and if identical marks as readonly. * * This function is deprecated, and cannot be used on PHP >= 8.1. * * @since 4.9.0 * @deprecated 5.9.0 Use wp_readonly() introduced in 5.9.0. * * @see wp_readonly() * * @param mixed $readonly_value One of the values to compare. * @param mixed $current Optional. The other value to compare if not just true. * Default true. * @param bool $display Optional. Whether to echo or just return the string. * Default true. * @return string HTML attribute or empty string. */ function readonly( $readonly_value, $current = true, $display = true ) { _deprecated_function( __FUNCTION__, '5.9.0', 'wp_readonly()' ); return wp_readonly( $readonly_value, $current, $display ); }