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红河县网站建设,全面加强基层基础建设,网络工程师岗位职责,社团网站建设Laravel 项目运行中，有时候需要查看sql语句，分析sql运行的耗时，sql语句的复杂程度分析等等总之，sql的执行在项目中，非常关键，接下来将说明在laravel 中配置一个sql日志记录服务。开发思路：…

Laravel 项目运行中，有时候需要查看sql语句，分析sql运行的耗时，sql语句的复杂程度分析等等

总之，sql的执行在项目中，非常关键，接下来将说明在laravel 中配置一个sql日志记录服务。

开发思路：

使用 Laravel 事件系统监听 QueryExecuted 事件
通过监听服务，将监听到的sql信息记录到日志文件

代码开发

1. 日志通道配置一个记录sql的日志通道

文件：config/logging.php

'channels' => ['sqllog' => ['driver' => 'daily','path' => storage_path('logs/sql.log'),'level' => 'debug','days' => 7,'permission' => 0664,],
];

通道名称 sqllog，驱动程序 daily , path是路径，level 为等级，days 保留7天，permission 为文件权限

2.事件系统配置监听事件

文件：app/Providers/EventServiceProvider.php

 protected $listen = [QueryExecuted::class => [LogDBQuery::class,],];

QueryExecuted::class 是 Laravel 数据库系统中的一个核心事件，也是 Laravel 数据库层最基础也是最有用的事件之一，其在数据库完成查询后触发。
- 触发的时机:
  - SELECT 查询
  - INSERT/UPDATE/DELETE 操作
  - 事务操作（BEGIN, COMMIT, ROLLBACK）
  - 存储过程调用
- 事件对象包含的信息
  - public string $sql; // 执行的SQL语句（带占位符）
  - public array $bindings; // 绑定的参数值
  - public float $time; // 执行时间（毫秒）
  - public string $connectionName; // 使用的连接名称（如’mysql’）
  - public object $connection; // 数据库连接实例
LogDBQuery::class 是自己开发一个监听服务类

3.监听服务开放

目录：app/Listeners，创建类 LogDBQuery.php

<?phpnamespace App\Listeners;use Illuminate\Contracts\Queue\ShouldQueue;
use Illuminate\Database\Events\QueryExecuted;
use Illuminate\Queue\InteractsWithQueue;
use Illuminate\Support\Facades\App;
use Illuminate\Support\Facades\Log;
use Illuminate\Support\Str;class LogDBQuery
{// 慢查询阈值(毫秒)protected const SLOW_QUERY_THRESHOLD = 500;/*** 处理查询事件*/public function handle(QueryExecuted $event): void{// 只在本地和测试环境记录if(!App::environment(['local', 'testing'])){return;}// 随机抽取 10% 的查询日志if(random_int(1, 100) > 10){return;}$context = $this->buildLogContext($event);if($event->time > self::SLOW_QUERY_THRESHOLD){Log::channel('sqllog')->warning("Slow query detected", $context);}else{Log::channel('sqllog')->debug("Query executed", $context);}}/*** 格式化 SQL 语句*/protected function formatSql(string $sql, array $bindings): string{if(empty($bindings)){return $sql;}$escapedBindings = array_map(fn($value) => $this->escapeBinding($value), $bindings);return Str::replaceArray('?', $escapedBindings, $sql);}/*** 转义绑定参数*/protected function escapeBinding(mixed $value): string{if(is_null($value)){return 'NULL';}if(is_bool($value)){return $value ? '1' : '0';}if(is_numeric($value)){return (string)$value;}return "'" . addslashes((string)$value) . "'";}/*** 构建日志上下文*/protected function buildLogContext(QueryExecuted $event): array{return ['sql' => $this->formatSql($event->sql, $event->bindings),'time' => $event->time . 'ms','connection' => $event->connectionName,'bindings' => $event->bindings,'raw_sql' => $event->sql,];}
}

监听类执行流程

1事件触发 → 2. 框架查找监听器 → 3. 实例化监听器 → 4. 调用 handle()

代码解释：

SLOW_QUERY_THRESHOLD 添加一个慢查询的阈值，如果查询时间大于阈值，则是慢查询
handle 自动执行：

当非生产环境，则执行

 if(!App::environment(['local', 'testing'])){return;}

随机抽查 10%的日志记录

 if(random_int(1, 100) > 10){return;}

构建日志上下文数组，记录sql的语句，时间，连接等信息

protected function buildLogContext(QueryExecuted $event): array{return ['sql' => $this->formatSql($event->sql, $event->bindings),'time' => $event->time . 'ms','connection' => $event->connectionName,'bindings' => $event->bindings,'raw_sql' => $event->sql,];}

检测是否是慢查询，记录不同级别的日志，提高日志的可观察性

if($event->time > self::SLOW_QUERY_THRESHOLD){Log::channel('sqllog')->warning("慢查询SQL", $context);}else{Log::channel('sqllog')->debug("执行SQL", $context);}

完成上述构建，测试一下：

[2025-03-31 14:10:26] local.DEBUG: 执行SQL {"sql":"select count(*) as aggregate from `project_info` where `project_info`.`deleted_at` is null","time":"24.21ms","connection":"mysql","bindings":[],"raw_sql":"select count(*) as aggregate from `project_info` where `project_info`.`deleted_at` is null"} 
[2025-03-31 14:10:26] local.DEBUG: 执行SQL {"sql":"select * from `project_info` where `project_info`.`deleted_at` is null order by `id` desc limit 10 offset 0","time":"24.77ms","connection":"mysql","bindings":[],"raw_sql":"select * from `project_info` where `project_info`.`deleted_at` is null order by `id` desc limit 10 offset 0"}