在我看来，这将是初学者的最佳方法：

echo "<pre>";
print_r($query->toSql());
print_r($query->getBindings());

这里也描述了这一点。https://stackoverflow.com/a/59207557/9573341

我创建了一些简单的函数来从一些查询中获取SQL和绑定。

/**
 * getSql
 *
 * Usage:
 * getSql( DB::table("users") )
 * 
 * Get the current SQL and bindings
 * 
 * @param  mixed  $query  Relation / Eloquent Builder / Query Builder
 * @return array          Array with sql and bindings or else false
 */
function getSql($query)
{
    if( $query instanceof Illuminate\Database\Eloquent\Relations\Relation )
    {
        $query = $query->getBaseQuery();
    }

    if( $query instanceof Illuminate\Database\Eloquent\Builder )
    {
        $query = $query->getQuery();
    }

    if( $query instanceof Illuminate\Database\Query\Builder )
    {
        return [ 'query' => $query->toSql(), 'bindings' => $query->getBindings() ];
    }

    return false;
}

/**
 * logQuery
 *
 * Get the SQL from a query in a closure
 *
 * Usage:
 * logQueries(function() {
 *     return User::first()->applications;
 * });
 * 
 * @param  closure $callback              function to call some queries in
 * @return Illuminate\Support\Collection  Collection of queries
 */
function logQueries(closure $callback) 
{
    // check if query logging is enabled
    $logging = DB::logging();

    // Get number of queries
    $numberOfQueries = count(DB::getQueryLog());

    // if logging not enabled, temporarily enable it
    if( !$logging ) DB::enableQueryLog();

    $query = $callback();

    $lastQuery = getSql($query);

    // Get querylog
    $queries = new Illuminate\Support\Collection( DB::getQueryLog() );

    // calculate the number of queries done in callback
    $queryCount = $queries->count() - $numberOfQueries;

    // Get last queries
    $lastQueries = $queries->take(-$queryCount);

    // disable query logging
    if( !$logging ) DB::disableQueryLog();

    // if callback returns a builder object, return the sql and bindings of it
    if( $lastQuery )
    {
        $lastQueries->push($lastQuery);
    }

    return $lastQueries;
}

用法：

getSql( DB::table('users') );
// returns 
// [
//     "sql" => "select * from `users`",
//     "bindings" => [],
// ]

getSql( $project->rooms() );
// returns
// [
//     "sql" => "select * from `rooms` where `rooms`.`project_id` = ? and `rooms`.`project_id` is not null",
//     "bindings" => [ 7 ],
// ]

如果您试图使用Illuminate而不使用Laravel获取日志，请使用：

\Illuminate\Database\Capsule\Manager::getQueryLog();

你也可以像这样设置一个快速功能：

function logger()
{
    $queries = \Illuminate\Database\Capsule\Manager::getQueryLog();
    $formattedQueries = [];
    foreach ($queries as $query) :
        $prep = $query['query'];

        foreach ($query['bindings'] as $binding) :

            if (is_bool($binding)) {
                $val = $binding === true ? 'TRUE' : 'FALSE';
            } else if (is_numeric($binding)) {
                $val = $binding;
            } else {
                $val = "'$binding'";
            }

            $prep = preg_replace("#\?#", $val, $prep, 1);
        endforeach;
        $formattedQueries[] = $prep;
    endforeach;
    return $formattedQueries;
}

EDIT

更新的版本似乎在默认情况下禁用了查询日志记录（上面返回了一个空数组）。要重新启用，在初始化Capsule Manager时，获取连接的实例并调用enableQueryLog方法

$capsule::connection()->enableQueryLog();

再次编辑

考虑到实际问题，您实际上可以执行以下操作来转换当前的单个查询，而不是之前的所有查询：

$sql = $query->toSql();
$bindings = $query->getBindings();

对QueryBuilder实例使用toSql（）方法。

DB:：table（'users'）->toSql（）将返回：

从用户中选择*`

这比连接事件侦听器更容易，而且还允许您在构建查询时随时检查查询的实际外观。

注意：此方法适用于查询生成器或Elquent，但使用toSql（）代替first（）或get（）。不能使用此方法同时运行查询和获取SQL。

虽然我很喜欢这个框架，但我讨厌它像垃圾一样运行。

DB:：enableQueryLog（）完全无用。DB：：听同样没用。当我说$query->count（）时，它显示了部分查询，但如果我执行$query->get（），它就没有什么好说的了。

唯一一个似乎能持续工作的解决方案是，故意在ORM参数中添加一些语法或其他错误，例如不存在的列/表名，在调试模式下在命令行上运行代码，最后将通过完整的“frickin”查询吐出SQL错误。否则，如果从web服务器运行，则希望错误出现在日志文件中。

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);