Laravel
Laravel Application Helper Function: validator
Learn how to use the validator helper function in Laravel to validate input data. The validator function is a versatile helper function that can be used with or without arguments. When used without arguments, it returns an instance of Illuminate\Contracts\Validation\Factory that provides access to validation methods. You can also use the validator function with arguments to directly call the make method on the factory instance.
Laravel Application Helper Function: view
The view function in Laravel can be used to return a view instance or a view factory. When called without arguments, it returns the view factory. When called with arguments, it creates a view instance based on the provided view file name, initial data, and additional data to be merged. The provided data can be an array or an object that implements the Arrayable interface. To render a view to a string, you can use the render method on the view instance.
Laravel Application Helper: old
The old helper function is used to retrieve an old input item from a previous request. It accepts a $key argument that should be the name of the input item to retrieve. A $default value can also be supplied to be returned if the given $key does not exist. There are alternative methods to achieve the same result, such as using the Input facade or the request() helper function.
Laravel Application Helper: policy
Learn how to retrieve a policy instance using the policy helper function in Laravel. This function allows you to retrieve a policy class instance for a given class name or object. If no policies have been registered for the class, an exception will be thrown.
Laravel Application Helper: public_path
The public_path function in Laravel returns the path to the public directory. It can also be used to construct paths relative to the public directory by providing a $path argument. The function does not automatically add a trailing slash to the final path, but this can be achieved by using the str_finish function in conjunction with public_path.
Laravel Application Helper: response
The response helper function in Laravel can be used in two ways. When no arguments are provided, it returns an instance of Illuminate\Contracts\Routing\ResponseFactory which allows you to use methods like view or json to generate responses. On the other hand, if you pass arguments to the function, it uses the ResponseFactory::make method to create a new instance of Illuminate\Http\Response. You can also set the status code and add additional headers to the response.
Laravel Application Helper: storage_path
The storage_path function in Laravel returns the path to the storage directory. If a specific $path is provided, it constructs a path relative to the storage directory. The function does not automatically add a trailing slash to the returned string. To achieve this, you can use the str_finish function with storage_path as its argument. Examples are provided to illustrate its usage.
Laravel Array Helper Function: array_prepend (Easily Add an Item to the Beginning of an Array)
The prepend helper method allows you to add a value to the beginning of an array. You can optionally specify a key for the new item if the array is associative. The method returns a new modified copy of the original array, leaving the original unchanged. Additionally, there is a shortcut array_prepend helper function available in the global namespace that calls the Arr::prepend method.
Laravel Array Helper Function: array_sort
The sort helper method allows you to sort an array based on a given condition. The method iterates over the array and passes each value to a callback function, which determines the sort order. In this example, we create a new array of student test scores and use Arr::sort to sort it by either test score or student name. Additionally, there is a shortcut function called array_sort that serves as a global namespace for calling Arr::sort.
Laravel Array Helper Function: array_where
The where helper method is used to filter an array and create a new array based on a given callback function. It provides the flexibility to filter by both key and value, or just by value, depending on the logic provided in the callback. This method is helpful when you want to selectively extract specific elements from an array. For example, you can filter an array to include only numbers less than or equal to 10, or filter an array to include only students who have passed a test and whose name starts with the letter 'A'. The array_where function is a shorthand for calling Arr::where and is available in the global namespace.
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