resize image during upload

if(isset($_FILES['add_image1'])){ $tt=time(); $target_path = "../product_image/".$tt; $target_path = $target_path . basename( $_FILES["add_image1"]['name']); $pn="product_image/".basename( $_FILES["add_image1"]['name']); $ch=strtolower(substr($pn, strrpos($pn,".")+1)); if($ch=="jpg" or $ch=="png" or $ch=="jpeg" or $ch=="gif"){ $uploadedfile = $_FILES['add_image1']['tmp_name']; //$size=filesize($_FILES['add_image1']['tmp_name']); if (!empty($uploadedfile)){ $info = getimagesize($uploadedfile); if($ch=="jpg" || $ch=="jpeg" ) { if ($info['mime'] == 'image/jpeg') $src = imagecreatefromjpeg($uploadedfile); } else if($ch=="png") { if($info['mime'] == 'image/png') $src = imagecreatefrompng($uploadedfile); } else { if($info['mime'] == 'image/gif') $src = imagecreatefromgif($uploadedfile); } list($width,$height)=getimagesize($uploadedfile); $newwidth=100; $newheight=($height/$width)*$newwidth; $tmp=imagecreatetruecolor($newwidth,$newheight); if(!empty($src)){ imagecopyresampled($tmp,$src,0,0,0,0,$newwidth,$newheight,$width,$height); $filename = "../product_image/".$tt. $_FILES['add_image1']['name']; imagejpeg($tmp,$filename,100); imagedestroy($src); imagedestroy($tmp); mysqli_query($db_con,"update table_question set image='".$filename."' where question_id=".$pro_id); } } } }