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<?php namespace foo\bar; function get_declared_classes($in_namespace = null) { if ($in_namespace === null) { return get_declared_classes(); } if ($in_namespace{0} == '\\') { $in_namespace = substr($in_namespace, 1); } if (substr($in_namespace, -1) != '\\') { $in_namespace .= '\\'; } $filter = new RegexIterator(new ArrayIterator(get_declared_classes()), '/^' .preg_quote($in_namespace). '.*$'); return iterator_to_array($filter); } var_dump(get_declared_classes()); var_dump(get_declared_classes("foo\bar"));

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