resize รูปภาพครับ จะ error แบบนี้อะครับ Fatal error: Allowed memory size of 25165824 bytes exhausted (tried to allocate 10944 bytes) in ถ้าอัพรูปภาพขนาดเล็กไม่มีปัญหาครับ

<?
	$p_id = $_REQUEST['pr_id'];
	$p_name = $_REQUEST['pr_name'];
	$p_detail = $_REQUEST['pr_detail'];
	$p_action = $_REQUEST['hd_action'];
	$pr_picture = $_FILES['pr_picture']['tmp_name'];
	$pr_picture_name = $_FILES['pr_picture']['name'];
	$pr_picture_size = $_FILES['pr_picture']['size'];
	$pr_picture_type = $_FILES['pr_picture']['type'];
	$pr_doer = $_SESSION['login_name'];
	
	$sql_str = "insert into " . 
					"tbPr(pr_id, pr_name, pr_detail, pr_doer, update_date) " . 
					"values('" . $p_id . "','" . $p_name . "','" . $p_detail . "','" . $pr_doer . "', sysdate())";
	
//	echo $sql_str;
	
	$user = "root";
	$password = "root";
	$db_connect = mysql_connect("localhost",$user,$password) or die("ไม่สามารถเชื่อมต่อฐานข้อมูลได้");
	
	mysql_query("SET NAMES UTF8", $db_connect);
	
	mysql_select_db("myprdB",$db_connect) or die("ติดต่อฐานข้อมูลไม่ได้");
	mysql_query($sql_str,$db_connect) or die("เอ็กซิคิวต์คำสั่ง SQL ไม่ได้");
	
	//คำสั่งตรวจสอบนามสกุลของรูปภาพ
	$dbname = "myprdb";
	$ext = strtolower(end(explode('.' , $pr_picture_name)));
	if ($ext == "jpg" or $ext == "jpeg" or $ext == "png" or $ext == "gif") {
		
		$sql = "select max(pr_id) from tbpr";
		$result = mysql_db_query($dbname,$sql);
		$r = mysql_fetch_array($result);
		$id_max=$r[0];

		$filename=$id_max . "." . $ext;
		copy($pr_picture,"PrPhoto/$filename");
		//คำสั่ง resize รูปภาพ
		if ($ext =="jpg" or $ext == "jpeg") {
			$ori_img = imagecreatefromjpeg($pr_picture);
		} else if ($ext =="png") {
			$ori_img = imagecreatefrompng($pr_picture);
		} else if ($ext =="gif") {
			$ori_img = imagecreatefromgif($pr_picture);
		}
		$ori_size = getimagesize($pr_picture);
		$ori_w = $ori_size[0];
		$ori_h = $ori_size[1];
		if ($ori_w>=$ori_h) {
			$new_w = 500;
			$new_h = round(($new_w/$ori_w)*$ori_h);
		} else {
			$new_h = 500;
			$new_w = round(($new_h/$ori_h)*$ori_w);
		}
		$new_img = imagecreatetruecolor($new_w, $new_h);
		imagecopyresized($new_img, $ori_img, 0, 0, 0, 0, $new_w, $new_h, $ori_w, $ori_h);
		
		if ($ext =="jpg" or $ext =="jpeg") {
			imagejpeg($new_img, "PrPhoto/$filename");
		} else if ($ext =="png") {
			imagepng($new_img, "PrPhoto/$filename");
		} else if ($ext =="gif") {
			imagegif($new_img, "PrPhoto/$filename");
		}
		imagedestroy($ori_img);
		imagedestroy($new_img);
		
		$sql = "update tbpr set picture = '$filename' where pr_id = '$id_max' ";
		mysql_db_query($dbname,$sql);
	}
	
	mysql_close($db_connect);
	header("Location: index.php?viewpage=showroom");
?>