<?php $aliases = [ 'foo', 'bar-1', 'joomla-23', 'joom-0', ]; foreach ($aliases as &$alias) { $alias = preg_replace_callback( '~(?:-\K\d+)?$~', function ($m) { return strlen($m[0]) ? 1 + $m[0] : '-2'; }, $alias, 1 ); } var_export($aliases);
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