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<?php $string = "The Chernobyl disaster was a catastrophic nuclear accident that occurred on 26 April 1986, in the No. 4 nuclear reactor at the Chernobyl Nuclear Power Plant, near the city of Pripyat, in the north of the Ukrainian SSR."; $pattern = '%[A-Z]\w+%'; $replacement = "****"; $newString = preg_filter($pattern, $replacement, $string); print($newString);
Output for git.master, git.master_jit, rfc.property-hooks
**** **** disaster was a catastrophic nuclear accident that occurred on 26 **** 1986, in the ****. 4 nuclear reactor at the **** **** **** ****, near the city of ****, in the north of the **** ****.

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