MQTT在PHP开发中的数据压缩与资源优化技巧

<?php
// 压缩数据
$data = "需要压缩的数据";
$compressedData = gzcompress($data, 9);
echo "压缩前长度：" . strlen($data) . "
";
echo "压缩后长度：" . strlen($compressedData) . "
";

// 解压缩数据
$uncompressedData = gzuncompress($compressedData);
echo "解压缩后数据：" . $uncompressedData . "
";
?>

<?php
// 加载protobuf-php库
require './protobuf-php/autoload.php';

use FooBar;
use GoogleProtobufInternalGPBType;

// 创建消息对象
$message = new Bar();
$message->setId(1);
$message->setName('John Doe');

// 序列化数据
$serializedData = $message->serializeToString();

// 反序列化数据
$deserializedData = new Bar();
$deserializedData->parseFromString($serializedData);
?>

<?php
$client = new MosquittoClient();

// 设置QoS等级为1
$client->setCredentials('username', 'password');
$client->connect('localhost', 1883, 5);
$client->publish('topic', 'message', 1);
$client->loop();
?>

<?php
$client = new MosquittoClient();

// 使用持久化连接
$client->setCredentials('username', 'password');
$client->setPersistent('client_id');
$client->connect('localhost', 1883, 5);
$client->publish('topic', 'message', 1);
$client->loop();
?>