validation rule

UniqueNumbers.php

<?php

namespace App\Rules;

use Illuminate\Contracts\Validation\Rule;

class UniqueNumbers implements Rule
{
    /**
     * Create a new rule instance.
     *
     * @return void
     */
    public function __construct($numbers)
    {
        $this->numbers = $numbers;
    }

    /**
     * Determine if the validation rule passes.
     *
     * @param  string  $attribute
     * @param  mixed  $value
     * @return bool
     */
    public function passes($attribute, $value)
    {
       return count(array_keys($this->numbers, $value)) == 1 ? true : false;
    }

    /**
     * Get the validation error message.
     *
     * @return string
     */
    public function message()
    {
        return 'Duplicate number detected';
    }
}