Why does a function report an error when using use?

phpstorm error:

Code:

<code>$container = [];
function app($class_name) use ($container)
{
    return $container -> get($class_name);
}
</code>

Error report:

<code>Parse error: syntax error, unexpected 'use' (T_USE), expecting '{' in C:\Users\shellus\www\php-redis-note\public\index.php on line 16</code>