PHP Password Abfrage, ich kriegs einfach nicht hin :|

<?php


// A list of permitted file extensions
$allowed = array('png', 'jpg', 'gif', 'bmp', 'ico');


if (isset($_FILES['upl']) && $_FILES['upl']['error'] == 0){


    $extension = pathinfo($_FILES['upl']['name'], PATHINFO_EXTENSION);


    if(!in_array(strtolower($extension), $allowed)){
        echo '{"status":"error"}';
        exit;
    }


if (!$_POST['password'] == 'PW') {echo '{"status":"error"}'; exit;}
    if(move_uploaded_file($_FILES['upl']['tmp_name'], 'uploads/images/'.$_FILES['upl']['name'])){
        echo '{"status":"success"}';
        exit;
    }


echo '{"status":"error"}';
exit;

<?php
	// A list of permitted file extensions
	$allowed = array('png', 'jpg', 'gif', 'bmp', 'ico');


	if($_POST['password'] == 'PW' && isset($_FILES['upl']) && $_FILES['upl']['error'] == 0) {
		$extension = pathinfo($_FILES['upl']['name'], PATHINFO_EXTENSION);

		if(!in_array(strtolower($extension), $allowed)) {
			die('{"status":"error"}');
		}


		if(move_uploaded_file($_FILES['upl']['tmp_name'], 'uploads/images/'.$_FILES['upl']['name'])) {
			die('{"status":"success"}');
		}
	}

	die('{"status":"error"}');