[php] How to Get the Query Executed in Laravel 5? DB::getQueryLog() Returning Empty Array

I'm trying to view the log for a query, but DB::getQueryLog() is just returning an empty array:

$user = User::find(5);
print_r(DB::getQueryLog());

Result

Array
(
)

How can I view the log for this query?

Suppose you want to print the SQL query of the following statements.

$user = User::find(5);

You just need to do as follows:

DB::enableQueryLog();//enable query logging

$user = User::find(5);

print_r(DB::getQueryLog());//print sql query

This will print the last executed query in Laravel.

For laravel 5 and onwards using only DB::getQueryLog() , will not do. BY default in this the value of

 protected $loggingQueries = false;

change it to

protected $loggingQueries = true; 

in the below file for logging query.

/vendor/laravel/framework/src/illuminate/Database/Connection.php 

And then we can use the DB::getQueryLog() where you want to print the query.

Add this function to your helper file and simply call.

function getRawQuery($sql){
        $query = str_replace(array('?'), array('\'%s\''), $sql->toSql());
        $query = vsprintf($query, $sql->getBindings());     
        return $query;
}

Output: "select * from user where status = '1' order by id desc limit 25 offset 0"

Apparently with Laravel 5.2, the closure in DB::listen only receives a single parameter.

So, if you want to use DB::listen in Laravel 5.2, you should do something like:

DB::listen(
    function ($sql) {
        // $sql is an object with the properties:
        //  sql: The query
        //  bindings: the sql query variables
        //  time: The execution time for the query
        //  connectionName: The name of the connection

        // To save the executed queries to file:
        // Process the sql and the bindings:
        foreach ($sql->bindings as $i => $binding) {
            if ($binding instanceof \DateTime) {
                $sql->bindings[$i] = $binding->format('\'Y-m-d H:i:s\'');
            } else {
                if (is_string($binding)) {
                    $sql->bindings[$i] = "'$binding'";
                }
            }
        }

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

        $query = vsprintf($query, $sql->bindings);

        // Save the query to file
        $logFile = fopen(
            storage_path('logs' . DIRECTORY_SEPARATOR . date('Y-m-d') . '_query.log'),
            'a+'
        );
        fwrite($logFile, date('Y-m-d H:i:s') . ': ' . $query . PHP_EOL);
        fclose($logFile);
    }
);

Put this on routes.php file:

\Event::listen('Illuminate\Database\Events\QueryExecuted', function ($query) {
    echo'<pre>';
    var_dump($query->sql);
    var_dump($query->bindings);
    var_dump($query->time);
    echo'</pre>';
});

Submitted by msurguy, source code in this page. You will find this fix-code for laravel 5.2 in comments.

Use toSql() instead of get() like so:

$users = User::orderBy('name', 'asc')->toSql();
echo $users;
// Outputs the string:
'select * from `users` order by `name` asc'

(Laravel 5.2) I find the simplest way is just to add one code line to monitor the sql queries:

\DB::listen(function($sql) {var_dump($sql); });

I think the answer located in this article: https://arjunphp.com/laravel-5-5-log-eloquent-queries/

is fast and simple to achieve query logging.

You just have to add to the AppServiceProvider in the boot method a callback to listen to DB queries:

namespace App\Providers;

use DB;
use Illuminate\Support\ServiceProvider;

class AppServiceProvider extends ServiceProvider
{
    public function boot()
    {
        DB::listen(function($query) {
            logger()->info($query->sql . print_r($query->bindings, true));
        });
    }
}

In continuing of the Apparently with Laravel 5.2, the closure in DB::listen only receives a single parameter... response above : you can put this code into the Middleware script and use it in the routes.

Additionally:

use Monolog\Logger;
use Monolog\Handler\StreamHandler;

$log = new Logger('sql');
$log->pushHandler(new StreamHandler(storage_path().'/logs/sql-' . date('Y-m-d') . '.log', Logger::INFO));

// add records to the log
$log->addInfo($query, $data);

This code is for:

• Laravel 5.2
• Log the statements into the mysql database

Here is the code, which is based on @milz 's answer:

    DB::listen(function($sql) {
        $LOG_TABLE_NAME = 'log';
        foreach ($sql->bindings as $i => $binding) {
            if ($binding instanceof \DateTime) {
                $sql->bindings[$i] = $binding->format('\'Y-m-d H:i:s\'');
            } else {
                if (is_string($binding)) {
                    $sql->bindings[$i] = "'$binding'";
                }
            }
        }
        // Insert bindings into query
        $query = str_replace(array('%', '?'), array('%%', '%s'), $sql->sql);
        $query = vsprintf($query, $sql->bindings);
        if(stripos($query, 'insert into `'.$LOG_TABLE_NAME.'`')===false){
            $toLog = new LogModel();
            $toLog->uId = 100;
            $toLog->sql = $query;
            $toLog->save();
        }
    });

The core is the if(stripos... line, which prevents the recursion of inserting the insert into log sql statement into database.

You need to first enable query logging

DB::enableQueryLog();

Then you can get query logs by simply:

dd(DB::getQueryLog());

It would be better if you enable query logging before application starts, which you can do in a BeforeMiddleware and then retrieve the executed queries in AfterMiddleware.

If all you really care about is the actual query (the last one run) for quick debugging purposes:

DB::enableQueryLog();

# your laravel query builder goes here

$laQuery = DB::getQueryLog();

$lcWhatYouWant = $laQuery[0]['query']; # <-------

# optionally disable the query log:
DB::disableQueryLog();

do a print_r() on $laQuery[0] to get the full query, including the bindings. (the $lcWhatYouWant variable above will have the variables replaced with ??)

If you're using something other than the main mysql connection, you'll need to use these instead:

DB::connection("mysql2")->enableQueryLog();

DB::connection("mysql2")->getQueryLog();

(with your connection name where "mysql2" is)

For laravel 5.8 you just add dd or dump.

Ex:

DB::table('users')->where('votes', '>', 100)->dd();

or

DB::table('users')->where('votes', '>', 100)->dump();

reference: https://laravel.com/docs/5.8/queries#debugging