Switch in Laravel 5 - Blade

Question

How can I use switch in blade templates? When I used:

@switch($login_error)
    @case(1)
        `E-mail` input is empty!
        @break
    @case(2)
        `Pa         


        

Answer 1

This is now built in Laravel 5.5 https://laravel.com/docs/5.5/blade#switch-statements

Answer 2

To overcome the space in 'switch ()', you can use code :

Blade::extend(function($value, $compiler){
    $value = preg_replace('/(\s*)@switch[ ]*\((.*)\)(?=\s)/', '$1<?php switch($2):', $value);
    $value = preg_replace('/(\s*)@endswitch(?=\s)/', '$1endswitch; ?>', $value);
    $value = preg_replace('/(\s*)@case[ ]*\((.*)\)(?=\s)/', '$1case $2: ?>', $value);
    $value = preg_replace('/(?<=\s)@default(?=\s)/', 'default: ?>', $value);
    $value = preg_replace('/(?<=\s)@breakswitch(?=\s)/', '<?php break;', $value);
    return $value;
  });

Answer 3

You can extend blade like so:

    Blade::directive('switch', function ($expression) {
        return "<?php switch($expression): ?>";
    });
    Blade::directive('case', function ($expression) {
        return "<?php case $expression: ?>";
    });
    Blade::directive('break', function () {
        return "<?php break; ?>";
    });
    Blade::directive('default', function () {
        return "<?php default: ?>";
    });
    Blade::directive('endswitch', function () {
        return "<?php endswitch; ?>";
    });

You can then use the following:

@switch($test)
@case(1)
        Words
@break
@case(2)
    Other Words
    @break
@default
    Default words
@endswitch

However do note the warnings in : http://php.net/manual/en/control-structures.alternative-syntax.php

If there is any whitespace between the switch(): and the first case then the whole code block will fail. That is a PHP limitation rather than a blade limitation. You may be able to bypass it by forcing the normal syntax e.g.:

Blade::directive('switch', function ($expression) {
    return "<?php switch($expression) { ?>";
});
Blade::directive('endswitch', function ($) {
    return "<?php } ?>";
});

But this feels a bit wrong.

Answer 4

You can just add these code in AppServiceProvider class boot method.

Blade::extend(function($value, $compiler){
        $value = preg_replace('/(\s*)@switch\((.*)\)(?=\s)/', '$1<?php switch($2):', $value);
        $value = preg_replace('/(\s*)@endswitch(?=\s)/', '$1endswitch; ?>', $value);
        $value = preg_replace('/(\s*)@case\((.*)\)(?=\s)/', '$1case $2: ?>', $value);
        $value = preg_replace('/(?<=\s)@default(?=\s)/', 'default: ?>', $value);
        $value = preg_replace('/(?<=\s)@breakswitch(?=\s)/', '<?php break;', $value);
        return $value;
    });

then you can use as:

@switch( $item )
    @case( condition_1 )
        // do something
    @breakswitch
    @case( condition_2 )
        // do something else
    @breakswitch
    @default
        // do default behaviour
    @breakswitch
@endswitch

Enjoy It~

Answer 5

IN LARAVEL 5.2 AND UP:

Write your usual code between the opening and closing PHP statements.

@php
switch (x) {
    case 1:
        //code to be executed
        break;
    default:
        //code to be executed
}
@endphp

Answer 6

When you start using switch statements within your views, that usually indicate that you can further re-factor your code. Business logic is not meant for views, I would rather suggest you to do the switch statement within your controller and then pass the switch statements outcome to the view.