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. 

this code useless !!!
you should put example for beginner

I disagree with the comment above. This code is definitely not useless. While a more detailed example might be better for beginners, I found this example very helpful to get a head start on how to validate my comma separated field. Thanks for posting.

<?php

namespace App\Rules\Emails;

use Illuminate\Contracts\Validation\Rule;
use Illuminate\Support\Facades\Validator;

class CommaSeparatedEmails implements Rule
{
    /**
     * Determine if the validation rule passes.
     *
     * @param  string  $attribute
     * @param  mixed  $value
     * @return bool
     */
    public function passes($attribute, $value)
    {
        return !Validator::make(
            [
                "{$attribute}" => explode(',', $value)
            ],
            [
                "{$attribute}.*" => 'required|email'
            ]
        )->fails();
    }

    /**
     * Get the validation error message.
     *
     * @return string
     */
    public function message()
    {
        return 'The :attribute must have valid email addresses.';
    }
}

Usage:

use App\Rules\Emails\CommaSeparatedEmails;

$request->validate([
      'daily_reports' => ['nullable', new CommaSeparatedEmails],
      'weekly_reports' => ['nullable', new CommaSeparatedEmails],
]);

@kartikkapatel Thanks for the solution!

All Examples here, are very well done.
The adjectives I would use here would be: Insightful, creative, and concise.
Absolutely nothing here is even remotely useless.
Keep up the great work!

Perfect, just what I needed. Thx mate.

@kartikkapatel solutions fails for nested attributes and there is no need to use "{$attribute}"

<?php

namespace App\Rules\Emails;

use Illuminate\Contracts\Validation\Rule;
use Illuminate\Support\Facades\Validator;

class CommaSeparatedEmails implements Rule
{
    /**
     * Determine if the validation rule passes.
     *
     * @param  string  $attribute
     * @param  mixed  $value
     * @return bool
     */
    public function passes($attribute, $value)
    {
        return Validator::make(
            [
                "attribute" => explode(',', $value)
            ],
            [
                "attribute.*" => 'required|email'
            ]
        )->passes();
    }

    /**
     * Get the validation error message.
     *
     * @return string
     */
    public function message()
    {
        return 'The :attribute must have valid email addresses.';
    }
}

now this works

use App\Rules\Emails\CommaSeparatedEmails;

$request->validate([
      'some.nested.field' => ['nullable', new CommaSeparatedEmails],
]);

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.