UsernameProviderFactory.php

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<?php
 
declare(strict_types=1);
 
namespace ILIAS\ApacheAuth\UsernameProvider;
 
final class UsernameProviderFactory
{
    public function fromClassNames(array $class_names): array
    {
        $instances = [];
        foreach ($class_names as $class) {
            if (!\is_string($class) || !class_exists($class)) {
                continue;
            }
 
            try {
                $obj = new $class();
            } catch (\Throwable) {
                continue;
            }
 
            if ($obj instanceof UsernameProvider) {
                $instances[] = $obj;
            }
        }
 
        return $instances;
    }
}