利用curl下载图片

function httpget($url,$dir="/data/",$filename = '') {

    if(!is_dir(DIR_IMAGE.$dir)){

        @mkdir(DIR_IMAGE.$dir,0755,true);

    }

$url = trim(str_replace(" ","%20",$url));

    $ch = curl_init();

    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);

    curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);

    curl_setopt($ch, CURLOPT_URL, $url);

    curl_setopt($ch, CURLOPT_TIMEOUT, 60);

    curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);

    $temp = curl_exec($ch);

    $fileext = pathinfo($url, PATHINFO_EXTENSION);

    $fileext = empty($fileext) ? "jpg" : $fileext;

    $filename = empty($filename) ? md5($url.time().rand()).".".$fileext : $filename.'_'.rand(1,9999999).".".$fileext;

    if($temp && file_put_contents(DIR_IMAGE.$dir.$filename,$temp)){

        return $dir.$filename;

    } else {

        return false;

    }

}