custom validator in laravel to validate comma separated emails.

custom validator in laravel to validate comma separated emails.php

<?php
// custom validator in laravel to validate comma separated emails. 

\Validator::extend("emails", function($attribute, $values, $parameters) {
            $value = explode(',', $values);
            $rules = [
                'email' => 'required|email',
            ];
            if ($value) {
                foreach ($value as $email) {
                    $data = [
                        'email' => $email
                    ];
                    $validator = \Validator::make($data, $rules);
                    if ($validator->fails()) {
                        return false;
                    }
                }
                return true;
            }
        });
        
        
// Custom message for that validation 
// pass this array as third parameter in \Validator::make
  array('emails' => ':attribute must have valid email addresses.');
  
  
// Usage: 
 $rules['notifications'] = 'emails'; // 'emails' is name of new rule. 

Nice snippet. I found a spatie's package which does something similar https://github.com/spatie/laravel-validation-rules#delimited

"attribute" => explode(',', $value)

can be further transformed to

"attribute" => array_map('trim', explode(',', $value))

if you want comma and space separated emails (which is more natural for some users) to be valid too.