通过微信接口，可以获取到微信头像的链接，例如：http://thirdwx.qlogo.cn/mmopen/y5vdnz5cVsANsZChfWe6IWsZ4PnWV9Tq78nvWoLvvvqWs0jOowJgAxSLZMqzibA41Fib82zZX6YGpd2D4jIfrN42XBXpmgZoFN，但是有时候我们需要下载微信的头像下来；

// 下载微信头像到本地
function upload_headimg($headimgurl){$header = array(   'User-Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:45.0) Gecko/20100101 Firefox/45.0',    'Accept-Language: zh-CN,zh;q=0.8,en-US;q=0.5,en;q=0.3',    'Accept-Encoding: gzip, deflate',);$url= $headimgurl;$curl = curl_init();curl_setopt($curl, CURLOPT_URL, $url);curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);curl_setopt($curl, CURLOPT_FOLLOWLOCATION, true);curl_setopt($curl, CURLOPT_ENCODING, 'gzip');curl_setopt($curl, CURLOPT_HTTPHEADER, $header);$data = curl_exec($curl);$code = curl_getinfo($curl, CURLINFO_HTTP_CODE);curl_close($curl);if ($code == 200) {//把URL格式的图片转成base64_encode格式的！    $imgBase64Code = "data:image/jpeg;base64," . base64_encode($data);}$img_content=$imgBase64Code;//图片内容if (preg_match('/^(data:\s*image\/(\w+);base64,)/', $img_content, $result)) {$type = $result[2];//得到图片类型png?jpg?gif? $new_file = "./public/headimg/".date("YmdHis").".".$type; if (file_put_contents($new_file, base64_decode(str_replace($result[1], '', $img_content)))) {return upload_img($new_file);// return "http://weixin.wy100.com/hyuser_sys/oldjie/".$new_file;// exit;}} return false;
}