php获取远程图片的两种:CURL方式和sockets方式获取远程图片

方式1：sockets

$a = "http://yi1.com.cn/content/uploadfile/201106/thum-f3ccdd27d2000e3f9255a7e3e2c4880020110622095243.jpg";

$local = 'socket1.gif';

$aa = getImg($a,$local);

/*
  *@ 完整的图片地址
  *@ 要存储的文件名
*/
function getImg( $url = "", $filename = "" ) {
    if(is_dir(basename($filename))) {
        echo "The Dir was not exits";
        Return false;
    }
    //去除URL连接上面可能的引号
    $url = preg_replace( '/(?:^[\'"]+|[\'"\/]+$)/', '', $url );
    if (!extension_loaded('sockets')) return false;
    //获取url各相关信息
    preg_match( '/http:\/\/([^\/\:]+(\:\d{1,5})?)(.*)/i', $url, $matches );
    if (!$matches) return false;
    $sock = socket_create( AF_INET, SOCK_STREAM, SOL_TCP );
    if ( !@socket_connect( $sock, $matches[1], $matches[2] ? substr($matches[2], 1 ) : 80 ) ) {
        return false;
    }
    //图片的相对地址
    $msg = 'GET ' . $matches[3] . " HTTP/1.1\r\n";
    //主机名称
    $msg .= 'Host: ' . $matches[1] . "\r\n";
    $msg .= 'Connection: Close' . "\r\n\r\n";
    socket_write( $sock, $msg );
    $bin = '';
    while ( $tmp = socket_read( $sock, 10 ) ) {
        $bin .= $tmp;
        $tmp = '';
    }
    $bin = explode("\r\n\r\n", $bin);
    $img = $bin[1];
    $h = fopen( $filename, 'wb' );
    $res = fwrite( $h, $img ) === false ? false : true;
    @socket_close( $sock );
    Return $res;
}

///////////////////////////////////////////////////////////////////////

来源：http://yi1.com.cn

方式2：curl

<?php

$url = "http://yi1.com.cn/content/uploadfile/201106/thum-f3ccdd27d2000e3f9255a7e3e2c4880020110622095243.jpg";

$filename = 'curl.gif';
//http://yi1.com.cn

getImg($url, $filename);
/*
  *@通过curl方式获取制定的图片到本地
  *@ 完整的图片地址
  *@ 要存储的文件名
*/
function getImg($url = "", $filename = "") {
    if(is_dir(basename($filename))) {
        echo "The Dir was not exits";
        Return false;
    }
    //去除URL连接上面可能的引号
    $url = preg_replace( '/(?:^[\'"]+|[\'"\/]+$)/', '', $url );

    $hander = curl_init();
    $fp = fopen($filename,'wb');

    curl_setopt($hander,CURLOPT_URL,$url);
    curl_setopt($hander,CURLOPT_FILE,$fp);
    curl_setopt($hander,CURLOPT_HEADER,0);
    curl_setopt($hander,CURLOPT_FOLLOWLOCATION,1);
    //curl_setopt($hander,CURLOPT_RETURNTRANSFER,false);//以数据流的方式返回数据,当为false是直接显示出来
    curl_setopt($hander,CURLOPT_TIMEOUT,60);

    /*$options = array(
        CURLOPT_URL=> 'http://yi1.com.cn/content/uploadfile/201106/thum-f3ccdd27d2000e3f9255a7e3e2c4880020110622095243.jpg',
        CURLOPT_FILE => $fp,
        CURLOPT_HEADER => 0,
        CURLOPT_FOLLOWLOCATION => 1,
        CURLOPT_TIMEOUT => 60
    );
    curl_setopt_array($hander, $options);
    */

    curl_exec($hander);
    curl_close($hander);
    fclose($fp);
    Return true;
}

?>

来源：http://yi1.com.cn 
原文：http://yi1.com.cn/posts/473