Laravel的“ withVariableName”如何工作？

Question

Looking at Laravel code I found they are passing variable from 'routes' to 'views' using the following method:

$arraysan = ['mike','robert','john'];    **//Variable to be passed**
return view('home')->withArraysan($arraysan); **//Variable passed with** name "withArraysan"

In that above syntax they call a function named withArraysan which doesn't exist.

Can somebody explain how its been handled in Laravel?

Answer 1

For a while now, PHP has had the concept of magic methods - these are special methods that can be added to a class to intercept method calls that do not exist.

It appears that Laravel Views implement __call - this then intercepts a call to an undefined method on the object, and is passed both the name of the method being called as well as the arguments. In this way, the View object can then see that the withArraysan call began with and call the concrete method with , passing the second part Arraysan as the first argument, and the argument to withArraysan as the second part.

Answer 2

If I've got your question then in Laravel they had a class View using magic method __call to handle the above function and the code for that function is like as follows

public function __call($method, $parameters)
{
    if (Str::startsWith($method, 'with')) {
        return $this->with(Str::snake(substr($method, 4)), $parameters[0]);
    }

    throw new BadMethodCallException("Method [$method] does not exist on view.");
}

And you can find this within

your_project_folder/vendor/laravel/framework/src/Illuminate/View/View.php

Answer 3

$arraysan = ['mike', 'robert', 'john'];    // Variable to be passed
return view('home')->with('AnyVariable', $arraysan); 

Try this! This will work.

Also check in home.blade.php,

<?php
    print_r($AnyVariable);die;
?>