PHP Laravel 5 elseif not behaving as expected

I have 2 variables that can either be filled with a value, be 'all' or be 'null'

Variable 1 is $type and variable 2 is $brand.

So if the user selects a type and a brand I want to query the cars accordingly. If the users selects nothing then the value is 'null' if the user selects 'all' then the value is 'all' obviously.

I've wrote the 4 scenario's out in commented code as follows:

//brand                 and type                -> get cars of brand and type
//brand = all or null   and type = all or null  -> get all cars
//brand                 and type = all or null  -> get cars of all types and brand
//brand = all or null   and type                -> get cars of all brands and type

this is my if structure:

if ($brand && $type) {
            $cars = Cars::where([
                ['cost', '<=', $budget],
                ['brand', '=', $brand],
                ['type', '=', $type]
            ])->get();
} elseif($brand == 'all' || $brand === null && $type == 'all' || $type === null) {
            $cars = Cars::where('cost', '<=', $budget)
                ->get();
} elseif($brand && $type == 'all' || $type === null) {
            $cars = Cars::where([
                ['cost', '<=', $budget],
                ['brand', '=', $brand],
            ])->get();
} elseif ($brand == 'all' || $brand === null && $type) {
            $cars = Cars::where([
                ['cost', '<=', $budget],
                ['type', '=', $type]
            ])->get();
}

Now when I check the value of $brand it's filled with Audi and $type is null.

Can someone please explain to me why I get the result of the first elseif? So my code thinks this is the case:

elseif($brand == 'all' || $brand === null && $type == 'all' || $type === null) {

Which is weird because $brand is neither 'all' or 'null' since it's 'Audi'

Hope it's clear.

from Newest questions tagged laravel-5 - Stack Overflow http://ift.tt/2ALAmG2
via IFTTT