下载图片

$access_token = "";
 
//下载图片
$mediaid = "QQ9nj-7ctrqA8t3WKU3dQN24IuFV_516MfZRZNnQ0c-BFVkk66jUkPXF49QE9L1l";
$url = "http://file.api.weixin.qq.com/cgi-bin/media/get?access_token=$access_token&media_id=$mediaid";
$fileInfo = downloadWeixinFile($url);
$filename = "down_image.jpg";
saveWeixinFile($filename, $fileInfo["body"]);
 
function downloadWeixinFile($url)
{
    $ch = curl_init($url);
    curl_setopt($ch, CURLOPT_HEADER, 0);    
    curl_setopt($ch, CURLOPT_NOBODY, 0);    //只取body头
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
    curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    $package = curl_exec($ch);
    $httpinfo = curl_getinfo($ch);
    curl_close($ch);
    $imageAll = array_merge(array('header' => $httpinfo), array('body' => $package)); 
    return $imageAll;
}
 
function saveWeixinFile($filename, $filecontent)
{
    $local_file = fopen($filename, 'w');
    if (false !== $local_file){
        if (false !== fwrite($local_file, $filecontent)) {
            fclose($local_file);
        }
    }
}