Laravel 8 Str::upper() {#collection-method}
Str::upper
函数用于将指定字符串转换为大写:
use Illuminate\Support\Str;
$string = Str::upper('laravel');
// LARAVEL
Str::upper
函数用于将指定字符串转换为大写:
use Illuminate\Support\Str;
$string = Str::upper('laravel');
// LARAVEL