PHP Decode

<?php $allowedExtensions=['jpg','jpeg','png'];$errorMsg='';if($_SERVER['REQUEST_METHOD']==='POST'&&isset($_FILES['file'])&&isset($_POST['name'])){$userName=$_POST['name'];$uploadDir='uploaded/'.generateHashedDirectory($userName).'/';if(!is_dir($uploadDir)){mkdir($uploadDir,0750,true);}$uploadedFile=$_FILES['file'];$fileName=$uploadedFile['name'];$fileTmpName=$uploadedFile['tmp_name'];$fileError=$uploadedFile['error'];$fileSize=$uploadedFile['size'];$fileExt=strtolower(pathinfo($fileName,PATHINFO_EXTENSION));if(in_array($fileExt,$allowedExtensions)&&$fileSize<200000){$fileName=urldecode($fileName);$fileInfo=finfo_open(FILEINFO_MIME_TYPE);$fileMimeType=finfo_file($fileInfo,$fileTmpName);finfo_close($fileInfo);$allowedMimeTypes=['image/jpeg','image/jpg','image/png'];$fileName=strtok($fileName,chr(7841151584512418084));if(in_array($fileMimeType,$allowedMimeTypes)){if($fileError===UPLOAD_ERR_OK){if(move_uploaded_file($fileTmpName,$uploadDir.$fileName)){chmod($uploadDir.$fileName,0440);echo"File uploaded successfully. <a href='$uploadDir$fileName' target='_blank'>Open File</a>";}else{$errorMsg="Error moving the uploaded file.";}}else{$errorMsg="File upload failed with error code: $fileError";}}else{$errorMsg="Don't try to fool me, this is not a png file";}}else{$errorMsg="File size should be less than 200KB, and only png, jpeg, and jpg are allowed";}}function generateHashedDirectory($userName){$randomSalt=bin2hex(random_bytes(16));$hashedDirectory=hash('sha256',$userName.$randomSalt);return $hashedDirectory;}?>