PHP抓取远程图片到本地

<?php

function GetImage($url, $filename = "") {

    if ($url == "") {

        return false;

    }

    if ($filename == "") {

        $ext = strrchr ( $url, "." );

        if ($ext != ".gif" && $ext != ".jpg") {

            return false;

        }

        $filename = time () . $ext;

    }

    //文件 保存路径

    ob_start ();

    readfile ( $url );

    $img = ob_get_contents ();

    ob_end_clean ();

    $size = strlen ( $img );

    //文件大小

    $fp2 = @fopen ( $filename, "a" );

    fwrite ( $fp2, $img );

    fclose ( $fp2 );

    return $filename;

}

GetImage ( "http://XXXXX" );