Laravel - request validation - laravel

Question

I extedned request class to create my own valdiation rules. In that class I added my custom validation function. In function I check if tags are pass regEx and I would like to filter tags to remove tags shorter then 2 characters.
And later keep in request only tags that passed validation.
public function createPost(PostRequest $request)
{
dd($request->all()); //In this place I would like to keep only tags passed through validation not all tags recived in request
}
Is it possibile to do it? How to set it in Request class?
'tags' => [
'nullable',
'string',
function ($attribute, $value, $fail){
$tagsArray = explode(',', $value);
if(count($tagsArray) > 5) {
$fail(__('place.tags_max_limit'));
}
$tagsFiltered = [];
foreach ($tagsArray as $tag){
$tag = trim($tag);
if(preg_match('/^[a-zA-Z]+$/',$tag)){
$tagsFiltered[] = $tag;
};
}
return $tagsFiltered;
}
],
EDIT:
I think we miss understanding. I would like to after validation have only tags that returned in variable $tagsFiltered; Not the same as recived in input.

Answer 1

You have to create this custom regex rule and use it into rules() function.
Like so:
public function rules()
{
return [
'tag' => 'regex:/[^]{2,}/'
];
}
public function createPost(PostRequest $request)
{
$request->validated();
}
And then just call it via validated() function wherever you want.

Answer 2

first define validation rule with this command:
php artisan make:rule TagsFilter
navigate to TagsFilter rule file and define your filter on passes method:
public function passes($attribute, $value)
{
$tagsArray = explode(',', $value);
$tagsFiltered = [];
foreach ($tagsArray as $tag){
$tag = trim($tag);
if(preg_match('/^[a-zA-Z]+$/',$tag)){
$tagsFiltered[] = $tag;
};
}
return count($tagsArray) > 5 && count($tagsFiltered) > 0;
}
then include your rule in your validation on controller:
$request->validate([
'tags' => ['required', new TagsFilter],
]);