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<?php $mac = '00:11:22:33:44:55'; $input = '233'; $regex = '('. implode(':*', str_split($input)) .')'; $mac = preg_replace('/'. $regex .'/', '<b>$1</b>', $mac); var_dump($mac);
Output for git.master, git.master_jit, rfc.property-hooks
string(24) "00:11:2<b>2:33</b>:44:55"

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