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<?php $errored = FALSE; set_error_handler(function ($errno, $errstr) use (&$errored) { $errored = TRUE; return TRUE; }); $excludedClasses = [ // These cause fatal errors on instantiation "Closure", "SQLite3", "Filter", "PDO" ]; var_dump( array_filter( get_declared_classes(), function ($className) use (&$errored, $excludedClasses) { $errored = FALSE; $class = new ReflectionClass($className); $constructor = $class->getMethod('__construct'); $constructor->setAccessible(true); if (!$class->isInstantiable() || $class->hasMethod('__construct') && $constructor->isPrivate()) { return FALSE; } foreach ($excludedClasses as $bannedClass) { if (substr($className, 0, strlen($bannedClass)) === $bannedClass) { return FALSE; } } if (!(new ReflectionClass($className))->hasMethod('__toString')) { try { $x = new $className; $x = (string)$x; return !$errored; } catch (Exception $e) { return FALSE; } } return FALSE; } ) );

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