mb_strtoupper

laravel/framework

Supported Versions: PHP 4 >= 4.3.0, PHP 5, PHP 7, PHP 8

Make a string uppercase

<?php mb_strtoupper(string $string, ?string $encoding = null): string

<?php     public static function upper($value)

    {

        return mb_strtoupper($value, 'UTF-8');

    }