php中，如何调用接口。

public function findActon($ip = null){    $params['id'] = 1;    $params['count'] = 100;    $options = array(        CURLOPT_RETURNTRANSFER => true,        CURLOPT_HEADER         => false,        CURLOPT_URL => 'http://mentuwang.com/cshen/listFromId',        CURLOPT_POST => true,        CURLOPT_POSTFIELDS => $params,    );    $ch = curl_init();    curl_setopt_array($ch, $options);    $response =  curl_exec($ch);    curl_close($ch);    return $response;}

说明：CURLOPT_URL指需要动用的接口。CURLOPT_POSTFIELDS指调用接口需要的参数。