把SQL打印在日志上

app/Providers/AppServiceProvider.php

@@ -3,7 +3,8 @@
 namespace App\Providers;
 
 use Illuminate\Support\ServiceProvider;
-
+use Illuminate\Support\Facades\DB;
+use Illuminate\Support\Facades\Log;
 class AppServiceProvider extends ServiceProvider
 {
     /**
@@ -23,6 +24,19 @@ class AppServiceProvider extends ServiceProvider
      */
     public function boot()
     {
-        //
+        //把SQL输出到日志中
+        if ($this->app->environment('local')) { // 仅在本地环境启用
+            DB::listen(function ($query) {
+                // 格式化 SQL 语句
+                $sql = $query->sql;
+                foreach ($query->bindings as $binding) {
+                    $sql = preg_replace('/\?/', "'" . addslashes($binding) . "'", $sql, 1);
+                }
+                // 输出到控制台
+                //dump($sql . ' [' . $query->time . 'ms]');
+                //输出到log
+                Log::info($sql . ' [' . $query->time . 'ms]');
+            });
+        }
     }
 }