<?php $tests = [ '1:10.10', '1.5.07', '0.3', '00:13,40', '15,17', ]; var_export( preg_replace_callback( '~(?:(\d+)\D+)??(?:(\d+)\D+)?(\d+)$~', function($m) { unset($m[0]); return vsprintf('%02d:%02d.%02d', $m); }, $tests ) );
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