IOS APNS推送php接口

<?phpif(strtoupper($_server['request_method']) != 'get'){    exit(json_encode([        'code' => 0,        'msg' => '错误请求'    ]));}if(!isset($_get['device_token'])){    exit(json_encode([        'code' => 0,        'msg' => '设备信息缺失'    ]));}if(!isset($_get['message'])){    exit(json_encode([        'code' => 0,        'msg' => '推送信息缺失'    ]));}if(strlen($_get['message']) > 256){    exit(json_encode([        'code' => 0,        'msg' => '推送信息长度超过256个字符'    ]));}if(!isset($_get['app_id'])){    exit(json_encode([        'code' => 0,        'msg' => 'appid缺失'    ]));}$apps = [    '101' => [        'cert' => './cert/1.pem',//ios生成的pem，        'password' => '1',//pem密码        'debug' => '1',//开发模式 1  生产模式0    ]];if(!array_key_exists($_get['app_id'], $apps)){    exit(json_encode([        'code' => 0,        'msg' => 'appid错误'    ]));}$ctx = stream_context_create();stream_context_set_option($ctx, 'ssl', 'local_cert', $apps[$_get['app_id']]['cert']);stream_context_set_option($ctx, 'ssl', 'passphrase', $apps[$_get['app_id']]['password']);// open a connection to the apns serverif($apps[$_get['app_id']]['debug']){    $fp = stream_socket_client(        'ssl://gateway.sandbox.push.apple.com:2195', $err,        $err_str, 60, stream_client_connect|stream_client_persistent, $ctx);}else{    $fp = stream_socket_client(        'ssl://gateway.push.apple.com:2195', $err,        $err_str, 60, stream_client_connect|stream_client_persistent, $ctx);}if (!$fp){    exit(json_encode([        'code' => 0,        'msg' => '连接apn服务器失败,错误码:'.$err.',错误信息:'.$err_str    ]));}$body['aps'] = array(    'alert' => $_get['message'],    'sound' => 'default');$payload = json_encode($body);// build the binary notification$msg = chr(0) . pack('n', 32) . pack('h*', $_get['device_token']) . pack('n', strlen($payload)) . $payload;// send it to the server$result = fwrite($fp, $msg, strlen($msg));fclose($fp);if(!$result){    exit(json_encode([        'code' => 0,        'msg' => '推送消息发送失败,信息:'.$result    ]));}else{    exit(json_encode([        'code' => 1,        'msg' => '推送消息发送成功,信息:'.$result    ]));}