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<?php $str="I am a string with several periods.period #1. period #2. period #3"; preg_match_all("/\.\s*\w/", $str, $matches); $matches[0] = array_unique($matches[0]); foreach($matches[0] as $match){ $str = str_replace($match, strtoupper($match), $str); } echo $str;
Output for git.master_jit, git.master, rfc.property-hooks
I am a string with several periods.Period #1. Period #2. Period #3

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