如何从PHP中删除S3中的目标文件

Question

I am trying to delete file from Amazon S3.

PHP Code:

<?php

$file = $_POST['file'];
var_dump($file);
include('s3_configExpansion.php');

ini_set('max_execution_time', 600);

// File upload into S3
if ($s3->deleteObject($bucket, $file))
{
    $msg = "S3 Delete Successful."; 
}

echo 'Deleted';

?>

I used this code for deleting. I have received the file at $file variable.

$file = 'folder/subfolder/filename.apk';

But file is not deleting from S3.