php – “用户”@ localhost’访问被拒绝到数据库’forge”随机

[2016-02-04 07:03:18] local.ERROR: PDOException: SQLSTATE[HY000] [1044] Access denied for user ''@'localhost' to database 'forge' in C:xampphtdocsrekoapivendorlaravelframeworksrcIlluminateDatabaseConnectorsConnector.php:55
Stack trace:
#0 C:xampphtdocsrekoapivendorlaravelframeworksrcIlluminateDatabaseConnectorsConnector.php(55): PDO->__construct('mysql:host=loca...','forge','',Array)
...

在十个调用之一中,我收到了500条错误消息,但我不知道为什么.其他电话会给出正确的结果.

.ENV

APP_ENV=local
APP_DEBUG=true
APP_KEY=bJM6O0MnrIPaTNwKKOqNJkGinRDv1fnc

DB_HOST=localhost
DB_DATABASE=reko
DB_USERNAME=root
DB_PASSWORD=

CACHE_DRIVER=file
SESSION_DRIVER=file
QUEUE_DRIVER=sync

搜索功能：

public function search(Modul $modul,Request $request)
{
    $question = Question::whereModulId($modul->id)
        ->where('value','LIKE','%' . $request->get('keywords') . '%')
        ->with('tags')
        ->whereHas('exams',function ($query) use ($request) {
            $query->where('date','>=',$request->get('year').'-01-01');
        });
    if (!$request->get('parent'))
        $question->where('type','<>','parent');
    if (!$request->get('own'))
        $question->where('type','own');
    if (!$request->get('normal'))
        $question->where('type','normal');
    if ($request->get('answered'))
        $question->has('answers');
    return $question->paginate(10);
}

为database.php

'mysql' => [
        'driver'    => 'mysql','host'      => env('DB_HOST','localhost'),'database'  => env('DB_DATABASE','forge'),'username'  => env('DB_USERNAME','password'  => env('DB_PASSWORD',''),'charset'   => 'utf8','collation' => 'utf8_unicode_ci','prefix'    => '','strict'    => false,],

我没有修改database.php文件,所有其他调用工作得很好.