Enable PHP in Widget Without Plugin - WordPress

/* * ****************** add php support ****************** */ add_filter('widget_text', 'enable_php_code', 99); function enable_php_code($text) { if (strpos($text, '<' . '?') !== false) { ob_start(); eval('?' . '>' . $text); $text = ob_get_contents(); ob_end_clean(); } return $text; }