PHP函数怎样记录函数的执行日志 PHP函数执行日志记录的实用方法

error_log()

<?php
function calculate_sum($a, $b) {
    // 记录函数调用和参数
    error_log("[INFO] calculate_sum called with a=$a, b=$b");

    if (!is_numeric($a) || !is_numeric($b)) {
        error_log("[WARNING] calculate_sum received non-numeric input: a=$a, b=$b");
        return null;
    }

    $start_time = microtime(true);
    $result = $a + $b;
    $end_time = microtime(true);
    $execution_time = round(($end_time - $start_time) * 1000, 2); // 毫秒

    // 记录结果和执行时间
    error_log("[INFO] calculate_sum finished. Result: $result, Time: {$execution_time}ms");
    return $result;
}

// 示例调用
calculate_sum(5, 10);
calculate_sum("hello", 20); // 会触发警告日志
?>

file_put_contents()

fopen()

fwrite()

<?php
/**
 * 简单的自定义日志函数
 * @param string $level 日志级别 (e.g., INFO, WARNING, ERROR)
 * @param string $message 日志消息
 * @param string $log_file 日志文件路径
 */
function custom_log($level, $message, $log_file = 'application.log') {
    $timestamp = date('Y-m-d H:i:s');
    $log_entry = "[$timestamp] [$level] $message\n";
    file_put_contents($log_file, $log_entry, FILE_APPEND);
}

function process_order($order_id, $items) {
    custom_log('INFO', "Processing order #$order_id with " . count($items) . " items.");

    if (empty($items)) {
        custom_log('WARNING', "Order #$order_id has no items. Skipping processing.");
        return false;
    }

    $total_amount = 0;
    foreach ($items as $item) {
        $total_amount += $item['price'] * $item['quantity'];
    }

    custom_log('DEBUG', "Calculated total amount for order #$order_id: $total_amount");

    // 模拟一些耗时操作或外部API调用
    usleep(rand(10000, 50000));

    custom_log('INFO', "Order #$order_id processed successfully. Total: $total_amount.");
    return true;
}

// 示例调用
process_order(1001, [['id' => 1, 'price' => 10, 'quantity' => 2]]);
process_order(1002, []);
?>

composer require monolog/monolog

<?php
require_once 'vendor/autoload.php'; // 确保Composer自动加载文件已引入

use Monolog\Logger;
use Monolog\Handler\StreamHandler;
use Monolog\Processor\UidProcessor;
use Monolog\Formatter\LineFormatter;

// 创建一个日志器实例
$log = new Logger('MyApp');

// 添加一个处理器，将日志写入到文件
// Logger::DEBUG 表示记录所有级别（DEBUG, INFO, WARNING, ERROR等）的日志
$handler = new StreamHandler('app_functions.log', Logger::DEBUG);

// 可以自定义日志格式
$formatter = new LineFormatter(
    "[%datetime%] %channel%.%level_name%: %message% %context% %extra%\n",
    "Y-m-d H:i:s.u", // 包含微秒
    true, // 允许空白行
    true // 允许JSON格式的context/extra
);
$handler->setFormatter($formatter);
$log->pushHandler($handler);

// 添加一个处理器，为每条日志添加一个唯一的请求ID
$log->pushProcessor(new UidProcessor());

function handle_request($request_data) {
    global $log; // 实际项目中，更推荐通过依赖注入传递Logger实例

    $log->info("Incoming request received.", ['method' => $request_data['method'], 'uri' => $request_data['uri']]);

    // 模拟处理逻辑
    try {
        if ($request_data['method'] === 'POST' && empty($request_data['body'])) {
            $log->warning("POST request with empty body.", ['uri' => $request_data['uri']]);
            throw new Exception("Request body cannot be empty for POST.");
        }
        $log->debug("Processing request body: " . json_encode($request_data['body']));
        // ... 实际业务逻辑 ...
        $log->info("Request processed successfully.");
        return ['status' => 'success'];
    } catch (Exception $e) {
        $log->error("Error processing request: " . $e->getMessage(), ['exception' => $e->getTraceAsString()]);
        return ['status' => 'error', 'message' => $e->getMessage()];
    }
}

// 示例调用
handle_request(['method' => 'GET', 'uri' => '/api/users', 'body' => []]);
handle_request(['method' => 'POST', 'uri' => '/api/data', 'body' => []]); // 会触发警告和错误日志
?>

var_dump

echo

AsyncHandler

RotatingFileHandler

error_log

file_put_contents

__call

echo