远程下载图片

function get_url_image($url){    $ext = explode(‘.‘, $url);    $ext = strtolower(end($ext));    if($ext != "gif" && $ext != "jpg" && $ext != "png" && $ext != "bmp" && $ext != "jpeg")    {        return $url;    }

$name = date(‘Ymd‘);    for ($i = 0; $i < 6; $i++)    {        $name .= chr(mt_rand(97, 122));    }    $name .= ‘.‘ . $ext;    $target = ROOT_PATH . DATA_DIR . ‘/afficheimg/‘ . $name;

$tmp_file = DATA_DIR . ‘/afficheimg/‘ . $name;    $filename = ROOT_PATH . $tmp_file;

$img = file_get_contents($url);

$fp = @fopen($filename, "a");    fwrite($fp, $img);    fclose($fp);

return $tmp_file;}

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// 主图上传if ($_FILES[‘topic_img‘][‘name‘] && $_FILES[‘topic_img‘][‘size‘] > 0){    /* 检查文件合法性 */    if(!get_file_suffix($_FILES[‘topic_img‘][‘name‘], $allow_suffix))    {        sys_msg($_LANG[‘invalid_type‘]);    }

/* 处理 */    $name = date(‘Ymd‘);    for ($i = 0; $i < 6; $i++)    {        $name .= chr(mt_rand(97, 122));    }    $name .= ‘.‘ . end(explode(‘.‘, $_FILES[‘topic_img‘][‘name‘]));    $target = ROOT_PATH . DATA_DIR . ‘/afficheimg/‘ . $name;

if (move_upload_file($_FILES[‘topic_img‘][‘tmp_name‘], $target))    {        $topic_img = DATA_DIR . ‘/afficheimg/‘ . $name;    }}else if (!empty($_REQUEST[‘url‘])){    /* 来自互联网图片 不可以是服务器地址 */    if(strstr($_REQUEST[‘url‘], ‘http‘) && !strstr($_REQUEST[‘url‘], $_SERVER[‘SERVER_NAME‘]))    {        /* 取互联网图片至本地 */        $topic_img = get_url_image($_REQUEST[‘url‘]);    }    else{        sys_msg($_LANG[‘web_url_no‘]);    }}