Php 微信获取 Token令牌

function getReqToken($url, $data = null,$method)
{
    $curl = curl_init();
    curl_setopt($curl, CURLOPT_URL, $url);
    curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, FALSE);
    curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, FALSE);
    if (! empty($data)) {

        if('GET' === strtoupper($method)){
            curl_setopt($curl, CURLOPT_HTTPGET, 1);

        }else{//POST
            curl_setopt($curl, CURLOPT_POST, 1);

        }
        curl_setopt($curl, CURLOPT_POSTFIELDS, $data);
    }
    curl_setopt($curl, CURLOPT_RETURNTRANSFER, TRUE);
    $output = curl_exec($curl);
    curl_close($curl);
     return $output;
}