在where条件中,我们使用了一个匿名函数,并通过use关键字将$variable传递进去。在匿名函数中,我们根据$variable的值来决定执行whereNull还是whereNotNull条件。 这样,当$variable为null时,查询结果将返回column_name为空的记录;当$variable不为null时,查询结果将返回column_name不为空的记录。 对于Laravel的更多信息和详细...
public function validateDifferent($attribute, $value, $parameters) { $this->requireParameterCount(1, $parameters, 'different'); foreach ($parameters as $parameter) { $other = Arr::get($this->data, $parameter); if (is_null($other) || $value === $other) { return false; ...
null (null) null (null) (null) nullIf you need to define an environment variable with a value that contains spaces, you may do so by enclosing the value in double quotes:APP_NAME="My Application"Retrieving Environment ConfigurationAll of the variables listed in the .env file will be loaded...
Lazy Collections & The$loopVariable Likelihood Of Impact: Low When iterating over aLazyCollectioninstance within a Blade template, the$loopvariable is no longer available, as accessing this variable causes the entireLazyCollectionto be loaded into memory, thus rendering the usage of lazy collections ...
Locate the aliases array variable Add the following line 'MyFuncs' => App\Helpers\MyFuncs::class, Save the changes using our custom helper. We will create a route that will call our custom helper function, open /app/routes.php Add the following route definition Route::get('/func', func...
SwitchBlade - Add several useful directives to Laravel Blade templates, including support for switch, variable and debugging output, and empty/null variable checks. [03/06/2017] Web Forms Bootforms - Package which simplifies and streamlines the process of specifying forms in Laravel with Bootstrap...
};//"hello"$example();//Inherited variable's value is from when the function is defined, not when called$message= "world\n";//"hello"$example();//Inherit by-reference$message= "hello\n";$example=function()use(&$message) {echo$message; ...
Infinitely appending element into static/global variable will lead to OOM(Out of Memory). class Test { public static $array = []; public static $string = ''; } // Controller public function test(Request $req) { // Out of Memory Test::$array[] = $req->input('param1'); Test::$...
classLoader{publicfunctionload(){$this->ensureFileIsReadable();$filePath=$this->filePath;$lines=$this->readLinesFromFile($filePath);foreach($linesas$line){if(!$this->isComment($line)&&$this->looksLikeSetter($line)){$this->setEnvironmentVariable($line);}}return$lines;}}...
Finally, don't forget to instruct your application to use the database driver by updating the QUEUE_CONNECTION variable in your application's .env file:QUEUE_CONNECTION=databaseCopyRedisIn order to use the redis queue driver, you should configure a Redis database connection in your config/data...