php 发送post请求

function request_post($url, $data) {
    $str = json_encode($data); //如果传的不是json字符串的话需要转一下
    $context = array(
        'http' =>
        array(
            'method' => 'POST',
            'header' => 'Content-type:application/json;charset=utf-8' . "\r\n" .
            // "Authorization:Basic".base64_encode($con['userid'].":".$con['password'])."\r\n".
            'Content-length' . strlen($str),
            'content' => $str
        )
    );
    $contextid = stream_context_create($context);
    $scok = fopen($url, 'r', false, $contextid);
    if ($scok) {
        $result = '';
        while (!feof($scok)) {
            $result .= fgets($scok, 4096);
        }
        fclose($scok);
        return $result;
    } else {
        return $str;
    }
}

调用

            $new_platform_data=[];
            $new_platform_data['imei'] = $device_id;
            $new_platform_data['sensor_status'] = $sensor_status;
            $new_platform_data['battery_value'] = $battery_value;
            $new_platform_data['temperature'] = $temperature;
            $new_platform_data['pressure'] = $pressure;
            $new_platform_data['wake_up'] = "{$wakehour}:{$wakeminute}:{$wakesecond}";
            try {
                request_post('http://127.0.0.1:1991/index/getData', $new_platform_data);
            } catch (\Exception $e) {
                echo_content("旧设备推送数据到新平台出错");
            }