A rule to check passing boolean-like values in validation requests

RealBoolean.php

<?php

namespace App\Rules;

use Illuminate\Contracts\Validation\Rule;

/**
 * Class RealBoolean
 *
 * To check on several values that can be interpreted as 'boolean'
 *
 * @package App\Rules
 */
class RealBoolean implements Rule
{
    /**
     * Create a new rule instance.
     *
     * @return void
     */
    public function __construct()
    {
        //
    }

    /**
     * Determine if the validation rule passes.
     *
     * @param  string  $attribute
     * @param  mixed  $value
     * @return bool
     */
    public function passes($attribute, $value) : bool
    {
        if ($value === true || $value === false) {
            return true;
        }
        $accept = [0, 1, '0', '1', 'true', 'false', 'j', 'n'];
        return in_array(strtolower($value), $accept, true);
    }

    /**
     * Get the validation error message.
     *
     * @return string
     */
    public function message() : string
    {
        return 'The :attribute must be a boolean value';
    }
}