Help with php script

[sorabh.v6]

Hi, I wrote a php script to upload docx, doc , pdf file to the server in abc folder and i want that file to be renamed with the name of uploader with uploading date as prefix. When i run it , it shows me error in line 13 and 14.Please help me . Thanks in advance.

PHP Code:

<?php
define("UPLOAD_DIR", "C:\wamp\www\abc\""); ///home/mgcons/my_file_uploads
$name=$_POST["name"];
if(!empty($_FILES["uploaded_file"] )){
    $myFile=$_FILES["uploaded_file"];
    if ($myFile["error"] !== UPLOAD_ERR_OK){
        echo "<p>An error occurred.</p>";
        exit;
        }
        $day=mktime(date("m"),date("d")+1,date("Y"));
        $ab=date("d m Y",$day);
        $bc=$ab.$name;
    $file_name=preg_replace($myFile["name"],$bc,$myFile["name"]);
    $success=move_uploaded_file($myFile["tmp_name"],UPLOAD_DIR.$file_name);
    if(!$success)
    {
        echo "Unable to save file.";
        exit;
        }
        chmod(UPLOAD_DIR . $file_name, 644);
    }
    $mime="application/pdf; charset=binary"."application/vnd.openxmlformats-officedocument.wordprocessingml.document"."application/vnd.ms-word.document.macroEnabled.12"."application/vnd.openxmlformats-officedocument.wordprocessingml.template"."application/vnd.ms-word.template.macroEnabled.12"."application/msword";
    exec("file -bi " . $_FILES["$myFile"]["tmp_name"], $out);
    if($out[0] != $mime){
        echo "File is not supported";
        }
        exec("clamscan --stdout ". $_FILES["$myFile"]["tmp_name"], $out, $return);
        if ($return){
            echo "This file is infected";
            }
?>