$data = User::toSql();
echo $data; //this will retrun select * from users. //here User is model

如果您使用的不是Laravel，而是Elquent包，那么：

use \Illuminate\Database\Capsule\Manager as Capsule;
use \Illuminate\Events\Dispatcher;
use \Illuminate\Container\Container;

$capsule = new Capsule;

$capsule->addConnection([
    // connection details
]);
// Set the event dispatcher used by Eloquent models... (optional)
$capsule->setEventDispatcher(new Dispatcher(new Container));

// Make this Capsule instance available globally via static methods... (optional)
$capsule->setAsGlobal();

// Setup the Eloquent ORM...(optional unless you've used setEventDispatcher())
$capsule->bootEloquent();

// Listen for Query Events for Debug
$events = new Dispatcher;
$events->listen('illuminate.query', function($query, $bindings, $time, $name)
{
    // Format binding data for sql insertion
    foreach ($bindings as $i => $binding) {
        if ($binding instanceof \DateTime) {
            $bindings[$i] = $binding->format('\'Y-m-d H:i:s\'');
        } else if (is_string($binding)) {
            $bindings[$i] = "'$binding'";`enter code here`
        }
    }

    // Insert bindings into query
    $query = str_replace(array('%', '?'), array('%%', '%s'), $query);
    $query = vsprintf($query, $bindings);

    // Debug SQL queries
    echo 'SQL: [' . $query . ']';
});

$capsule->setEventDispatcher($events);

我通过监听查询日志并附加到日志数组来实现：

//create query
$query=DB::table(...)...->where(...)...->orderBy(...)...
$log=[];//array of log lines
...
//invoked on query execution if query log is enabled
DB::listen(function ($query)use(&$log){
    $log[]=$query;//enqueue query data to logs
});
//enable query log
DB::enableQueryLog();
$res=$query->get();//execute

您可以收听“illumination.query”事件。在查询之前，添加以下事件侦听器：

Event::listen('illuminate.query', function($query, $params, $time, $conn) 
{ 
    dd(array($query, $params, $time, $conn));
});

DB::table('users')->get();

这将打印出如下内容：

array(4) {
  [0]=>
  string(21) "select * from "users""
  [1]=>
  array(0) {
  }
  [2]=>
  string(4) "0.94"
  [3]=>
  string(6) "sqlite"
}

要将上次运行的查询输出到屏幕，可以使用以下命令：

\DB::enableQueryLog(); // Enable query log

// Your Eloquent query executed by using get()

dd(\DB::getQueryLog()); // Show results of log

我相信最近的查询将位于阵列的底部。

你会得到这样的东西：

array(1) {
  [0]=>
  array(3) {
    ["query"]=>
    string(21) "select * from "users""
    ["bindings"]=>
    array(0) {
    }
    ["time"]=>
    string(4) "0.92"
  }
}

（感谢约书亚在下面的评论。）

从laravel 5.2开始。您可以使用DB:：listen获取执行的查询。

DB::listen(function ($query) {
    // $query->sql
    // $query->bindings
    // $query->time
});

或者，如果要调试单个Builder实例，则可以使用toSql方法。

DB::table('posts')->toSql();