PHP in Text Widgets Function

snippet.php

//To use PHP code in a text widget (useful for links and conditionals), place this code in your theme's functions.php file.
 
 
add_filter('widget_text', 'php_text', 99);
 
function php_text($text) {
 if (strpos($text, '<' . '?') !== false) {
 ob_start();
 eval('?' . '>' . $text);
 $text = ob_get_contents();
 ob_end_clean();
 }
 return $text;
}