ContentType:application/x-www-form-urlencoded请求方法遇到的坑【PHP】

有些API要求请求的内容类型为application/x-www-form-urlencoded

function requestUrl($url,$data=null,$https=true,$method='post'){
        //1.初始化url
        $ch = curl_init($url);
        //2.设置相关的参数
        //字符串不直接输出,进行一个变量的存储
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        //判断是否为https请求
        if($https === true){
            curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
            curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
        }
        //判断是否为post请求
        if($method == 'post'){
            curl_setopt($ch, CURLOPT_POST, true);
            curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($data));
        }
        curl_setopt($ch, CURLOPT_HTTPHEADER, array('Content-type:application/x-www-form-urlencoded'));
        //3.发送请求
        $str = curl_exec($ch);
        //4.关闭连接
        curl_close($ch);
        //6.返回请求到的结果
        return $str;
    }