curl 操作类

class my_curl {

    public function __construct() {

        !extension_loaded ( 'curl' ) && exit ( 'CURL扩展未加载，程序终止运行' );

        header ( 'Content-Type: text/html; charset=utf-8' );

    }

    public function go($url, $vars = '') {

        $ch = curl_init ();

        $array [CURLOPT_URL] = $url;

        $array [CURLOPT_HEADER] = false;

        $array [CURLOPT_RETURNTRANSFER] = true;

        $array [CURLOPT_FOLLOWLOCATION] = true;

        //https请求

        //curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);

        //curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);

        if (! empty ( $vars )) {

            $postfields = $this->render_postfields ( $vars ); //生成urlcode的url

            $array [CURLOPT_POST] = true;

            $array [CURLOPT_POSTFIELDS] = $postfields;

        }

        curl_setopt_array ( $ch, $array ); //传入curl参数

        $content = curl_exec ( $ch ); //执行

        curl_close ( $ch ); //关闭

        return $content; //返回

    }

    protected function render_postfields($vars) {

        $postdata = '';

        foreach ( $vars as $key => $values ) {

            $postdata .= $key . "=" . $values . "&";

        }

        return $postdata;

    }

}