php curl 下载图片到本地

<?php
//获取空间头像图片
$url = "http://qlogo2.store.qq.com/qzone/393183837/393183837/50";
$curl = curl_init($url);
$filename = date("Ymdhis").".jpg";
curl_setopt($curl,CURLOPT_RETURNTRANSFER,1);
$imageData = curl_exec($curl);
curl_close($curl);
$tp = @fopen($filename, ‘a’);
fwrite($tp, $imageData);
fclose($tp);
//phper地带 http://www.phperzone.cn
?>