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The keys method is used to retrieve the keys of all items in the collection. The keys method returns a new Collection instance. The behavior of the keys method is similar to PHP's array_keys function.1 public function keys ( ) ;The following code...
diffKeys($items) The diffKeys method is similar to the diff method. It is used to determine which items whose keys in the collection are not present in the supplied $items collection's keys. $items can be either an array, or another instead of...
The has helper method will return a boolean value that indicates if the given $key exists in the supplied $array , using dot notation. This method is incredibly useful when checking if an array has a specific key at an arbitrary depth.
The only method can be used to retrieve a subset of the provided array. The subset of the returned array is based on the values supplied to the $key parameter.
reduce(callable $callback, $initial = null) The reduce method is to reduce a collection into only one item. It does this by iterating over the collection and applying the $callback function on each item. The $callback function should define two...
Camel casing is similar to studly case such that each word starts with a capitalized letter, with the difference being the first character is lower cased. Like the studly method, the camel method will not affect the casing of the rest of the word....
The last method is the logical opposite of the first method, and is used to get the last item in a collection, or to get the last item in a collection that matches a certain criteria. A $callback can be supplied to return the last item in the...
The make:controller command can be used to quickly generate a new controller class file in the app/Http/Controllers directory. A name for the newly created controller must be provided. The name will become the name of the newly generated class and...
The class_uses_recursive function is functional similar to the trait_uses_recursive function. It will return an array of all the traits that are used by the given class, its traits and any base classes.The signature of the class_uses_recursive...
The clear-compiled command is used to clear the compiled classes and services application cache. These two files are located in the bootstrap/cache/ directory. The compiled classes cache is stored in a file named compiled.php and the services...