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<?php $filenames = [ 'abc(3).jpg', 'xyz.pdf' ]; foreach ($filenames as $filename) { echo preg_replace_callback('/(?:\((\d+)\))?(\.[^.]+$)/', function($matches) { $version = empty($matches[1]) ? 0 : $matches[1]; return '(' . ($version + 1) . ')' . $matches[2]; }, $filename); echo "\n"; }
Output for git.master, git.master_jit, rfc.property-hooks
abc(4).jpg xyz(1).pdf

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