微信公众号文章采集接口程序

用法：
http://localhost2/gather.php?dir=gather&url=http%3a%2f%2fmp.weixin.qq.com%2fs%3f__biz%3dMjM5Nzk3NjAxMg%3d%3d%26mid%3d2650417216%26idx%3d2%26sn%3da090a3fa0771d94f9489b6913e4e8616%26scene%3d0%23wechat_redirect

dir 采集文件的目录
url 必须是encode编码过的url。

class Gather {
    private $url;
    private $path;
    private function ksort($arr) {
        foreach ( $arr as $value ) {
            $temp [] = $value;
        }
        return $temp;
    }
    public function __construct($url, $path) {
        $this->url = $url;
        $this->path = $path;
        set_time_limit(0);
    }
    public function fetch() {
        return $this->transform ( $this->url, $this->path );
    }
    private function transform($url, $path) {
        if (! file_exists ( $path ))
            mkdir ( $path );
        $data ['url'] = $url;
        $content = file_get_contents ( $url );
        preg_match ( '/