常规做法使用CURL方法：

private function http_request($url,$data = null,$headers=array()){    $curl = curl_init();    if( count($headers) >= 1 ){        curl_setopt($curl, CURLOPT_HTTPHEADER, $headers);    }    curl_setopt($curl, CURLOPT_URL, $url);    curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, FALSE);    curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, FALSE);    if (!empty($data)){        curl_setopt($curl, CURLOPT_POST, 1);        curl_setopt($curl, CURLOPT_POSTFIELDS, $data);    }    curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);    $output = curl_exec($curl);    curl_close($curl);    return $output;}

具体使用：

$res = $this->http_request($url,$data);

还有一种：使用 file_get_contents：

public function httpfun(){    $loginUrl = "https://api.weixin.qq.com/sns/jscode2session?appid=".$this->appid."&secret=".$this->secret."&js_code=".$code."&grant_type=authorization_code";    $res = file_get_contents($loginUrl);    $wxres = json_decode($res,true);    echo $wxres;}