PHP消息队列开发技巧：实现分布式日志收集器

<?php
// 定义日志格式和消息队列配置

$logFormat = "[$module][$level][$timestamp] $content";

$mqConfig = [
    'host' => 'localhost',
    'port' => 5672,
    'user' => 'guest',
    'pass' => 'guest',
    'vhost' => '/',
    'exchange' => 'logs',
    'queue' => 'log_queue',
];

// 生产端代码，将日志消息发送到消息队列

function produceLog($module, $level, $content)
{
    global $logFormat, $mqConfig;
    $log = sprintf($logFormat, $module, $level, date('Y-m-d H:i:s'), $content);
    $connection = new AMQPConnection($mqConfig['host'], $mqConfig['port'], $mqConfig['user'], $mqConfig['pass'], $mqConfig['vhost']);
    $channel = $connection->channel();
    $channel->exchange_declare($mqConfig['exchange'], 'fanout', false, false, false);
    $msg = new AMQPMessage($log);
    $channel->basic_publish($msg, $mqConfig['exchange']);
    $channel->close();
    $connection->close();
}

// 消费端代码，从消息队列中取出日志消息，并进行存储和分析

function consumeLog()
{
    global $mqConfig;
    $connection = new AMQPConnection($mqConfig['host'], $mqConfig['port'], $mqConfig['user'], $mqConfig['pass'], $mqConfig['vhost']);
    $channel = $connection->channel();
    $channel->exchange_declare($mqConfig['exchange'], 'fanout', false, false, false);
    $channel->queue_declare($mqConfig['queue'], false, false, false, false);
    $channel->queue_bind($mqConfig['queue'], $mqConfig['exchange']);
    $callback = function ($msg) {
        // 处理日志消息
        storeLog($msg->body);
        echo " [x] Received ", $msg->body, "
";
    };
    $channel->basic_consume($mqConfig['queue'], '', false, true, false, false, $callback);
    while (count($channel->callbacks)) {
        $channel->wait();
    }
    $channel->close();
    $connection->close();
}

// 存储日志消息
function storeLog($log)
{
    // 存储日志到数据库或文件
}

// 主程序入口，启动消费端进行日志收集和处理
consumeLog();