Isset php code#

Isset php code#

this code being the exact definition for !empty(), because the very purpose of this function is to tell whether a variable is either not set or 'empty'.

So you can tell that the above snippet could be shortened to if (isset( $someVar ) & $someVar )īut the most funny part is. The below code can be seen too often to be ignored on this site dedicated to treating PHP delusions, being one of the most frequent cases: if (isset( $someVar ) & !empty( $someVar ))īeing unfamiliar with PHP's loose typing, learners often mistake if(!empty($someVar) with just if($someVar), thinking empty() will check for the empty-like values such as an empty string, a zero and such, whereas in PHP, for this purpose could be used the variable itself: thanks to the type juggling, when used in the conditional operator, any value will be cast to boolean, which will effectively check for the 'emptiness' already, making a dedicated function quite useless. This closure should type-hint the type of object that it is responsible for rendering.Do you really need to check for both isset() and empty() at the same time? To accomplish this, you should invoke Blade's stringable method. In these cases, Blade allows you to register a custom echo handler for that particular type of object. However, sometimes you may not have control over the _toString method of a given class, such as when the class that you are interacting with belongs to a third-party library. The _toString method is one of PHP's built-in 'magic methods'. If you attempt to 'echo' an object using Blade, the object's _toString method will be invoked. The cached Blade views may be removed using the view:clear Artisan command. If the array element has a numeric key, it will always be included in the rendered class list:Īfter updating the logic of a Blade directive, you will need to delete all of the cached Blade views. The directive accepts an array of classes where the array key contains the class or classes you wish to add, while the value is a boolean expression. The directive conditionally compiles a CSS class string. When in a nested loop, the parent's loop variable. Whether this is an odd iteration through the loop. Whether this is an even iteration through the loop. Whether this is the last iteration through the loop.

Whether this is the first iteration through the loop. The total number of items in the array being iterated. The current loop iteration (starts at 1). The index of the current loop iteration (starts at 0). Of course, as mentioned in the documentation on views, data may be passed to the Blade view using the view helper's second $loop variable also contains a variety of other useful properties: Property blade.php file extension and are typically stored in the resources/views directory.īlade views may be returned from routes or controllers using the global view helper. In fact, all Blade templates are compiled into plain PHP code and cached until they are modified, meaning Blade adds essentially zero overhead to your application. Unlike some PHP templating engines, Blade does not restrict you from using plain PHP code in your templates.

Blade is the simple, yet powerful templating engine that is included with Laravel.