doajaxfileupload.php

<?php
include_once("CONSTANTS.php");

$error = "";
$msg = "";
$fileElementName = 'playlistImage';
if (!empty($_FILES[$fileElementName]['error'])) {
    switch ($_FILES[$fileElementName]['error']) {

        case '1':
            $error = 'The uploaded file exceeds the upload_max_filesize directive in php.ini';
            break;
        case '2':
            $error = 'The uploaded file exceeds the MAX_FILE_SIZE directive that was specified in the HTML form';
            break;
        case '3':
            $error = 'The uploaded file was only partially uploaded';
            break;
        case '4':
            $error = 'No file was uploaded!';
            break;

        case '6':
            $error = 'Missing a temporary folder';
            break;
        case '7':
            $error = 'Failed to write file to disk';
            break;
        case '8':
            $error = 'File upload stopped by extension';
            break;
        case '999':
        default:
            $error = 'No error code avaiable';
    }
} elseif (empty($_FILES[$fileElementName]['tmp_name']) || $_FILES[$fileElementName]['tmp_name'] == 'none') {
    $error = 'No file was uploaded!';
} else {
    $target_path ='images/';
    $target_path = $target_path . basename( $_FILES[$fileElementName]['name']);
    move_uploaded_file($_FILES[$fileElementName]['tmp_name'], $target_path);
    $msg .= "images/" . rawurlencode($_FILES[$fileElementName]['name']);
    //for security reason, we force to remove all uploaded file
    @unlink($_FILES[$fileElementName]);
}
echo "{";
echo "error: '" . $error . "',\n";
echo "msg: '" . $msg . "'\n";
echo "}";

?>