以post方式传输 json数据

public static function http_post($url,$data_string,$timeout = 60)
    {
        //curl验证成功
        $ch = curl_init($url);
        curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "POST");
        curl_setopt($ch, CURLOPT_POSTFIELDS,$data_string);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER,true);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE); 跳过证书检查
        curl_setopt($ch, CURLOPT_TIMEOUT, $timeout);
        curl_setopt($ch, CURLOPT_HTTPHEADER, array(
            'Content-Type: application/json',
            'Content-Length: ' . strlen($data_string)
        ));
 
        $result = curl_exec($ch);
        if (curl_errno($ch)) {
            print curl_error($ch);
        }
        curl_close($ch);
        return $result;

｝