如何使用 PHP 实现远程监控和日志分析功能

<script src="https://code.jquery.com/jquery-3.5.1.min.js"></script>
<script>
    var socket = new WebSocket('ws://your_server:your_port');
    socket.onmessage = function(event) {
        var data = JSON.parse(event.data);
        // 处理服务器发送过来的数据
    };
</script>

<?php
    $server = new swoole_websocket_server('your_server', your_port);

    $server->on('open', function (swoole_websocket_server $server, $request) {
        // 客户端与服务器连接成功时触发
    });

    $server->on('message', function (swoole_websocket_server $server, $frame) {
        // 客户端发送消息时触发
    });

    $server->on('close', function ($ser, $fd) {
        // 客户端关闭连接时触发
    });

    $server->start();
?>

<?php
    // 获取 CPU 使用率（使用 top 命令）
    $cpu_usage = shell_exec('top -bn1 | grep "Cpu(s)" | awk '{print $2 + $4}'');

    // 获取内存使用情况（使用 free 命令）
    $memory_info = shell_exec('free -m | grep Mem');
    list($total, $used) = explode(' ', $memory_info);
    $memory_usage = round(($used / $total) * 100, 2);

    // 获取网络连接数（使用 netstat 命令）
    $netstat_info = shell_exec('netstat -nat | awk '$6 == "ESTABLISHED" {print $6}' | wc -l');

    // 将数据发送给客户端
    $server->push($frame->fd, json_encode([
        'cpu_usage' => $cpu_usage,
        'memory_usage' => $memory_usage,
        'netstat_info' => $netstat_info
    ]));
?>

<?php
    // 将日志信息写入到文件中
    error_log('Some error occurred.');

    // 从文件中读取最新的日志信息
    $log_path = '/path/to/log/file';
    $log_content = tailCustom($log_path, 10); // 读取最后 10 行日志内容

    // 将数据发送给客户端
    $server->push($frame->fd, json_encode([
        'log_content' => $log_content
    ]));

    // 读取最后 n 行日志内容
    function tailCustom($filepath, $lines) {
        $handle = fopen($filepath, 'r');
        $linecounter = $lines;
        $pos = -2;
        $beginning = false;
        $text = array();
        while ($linecounter > 0) {
            $t = ' ';
            while ($t !== "
") {
                if (fseek($handle, $pos, SEEK_END) == -1) {
                    $beginning = true;
                    break;
                }
                $t = fgetc($handle);
                $pos--;
            };
            $linecounter--;
            if ($beginning) {
                rewind($handle);
            }
            $text[$lines - $linecounter - 1] = fgets($handle);
            if ($beginning) break;
        }
        fclose($handle);
        return implode('', array_reverse($text));
    }
?>

<?php
    // 将日志信息写入到文件中
    error_log('Some error occurred.');
?>

<?php
    $log_content = '2021-01-01 10:01:23 [error] Some error occurred.';
    $pattern = '/^[(.*?)]s(.*?) (.*)$/';
    preg_match($pattern, $log_content, $matches);
    $log_date = $matches[1];
    $log_type = $matches[2];
    $log_message = $matches[3];
?>

<?php
    $error_logs = [
        '2021-01-01 10:01:23 [error] Some error occurred.',
        '2021-01-02 09:10:15 [warning] Some warning occurred.',
        '2021-01-03 14:05:29 [error] Another error occurred.',
        // ...
    ];
    $error_count = [];
    foreach ($error_logs as $log) {
        $pattern = '/^[(.*?)]/';
        preg_match($pattern, $log, $matches);
        $error_type = $matches[1];
        if (isset($error_count[$error_type])) {
            $error_count[$error_type]++;
        } else {
            $error_count[$error_type] = 1;
        }
    }

    // 输出统计结果
    foreach ($error_count as $error_type => $count) {
        echo $error_type . ': ' . $count . '<br>';
    }
?>