<?php

    $url = 'http://mf1905.com/upload/video_img/df3074c98ec5124ad47c52ff59f74e04_middle.jpeg';   

    function http_get_data($url) {   

        $ch = curl_init ();

        curl_setopt ( $ch, CURLOPT_CUSTOMREQUEST, 'GET' );

        curl_setopt ( $ch, CURLOPT_SSL_VERIFYPEER, false );

        curl_setopt ( $ch, CURLOPT_URL, $url );

        ob_start ();

        curl_exec ( $ch );

        $return_content = ob_get_contents ();

        ob_end_clean ();   

        $return_code = curl_getinfo ( $ch, CURLINFO_HTTP_CODE );

        return $return_content;

    }   

    $return_content = http_get_data($url);

    $filename = 'test.jpg';

    $fp= @fopen($filename,"a"); //将文件绑定到流 

    fwrite($fp,$return_content); //写入文件