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<?php $string = '12-34-56-78'; $pattern = '/^\d{2}(?|(---)|(-)|(\.)|(\:))\d{2}\1\d{2}\1\d{2}$/'; $result = preg_match($pattern, $string); var_dump($result); var_dump(PCRE_VERSION);
Output for git.master, git.master_jit, rfc.property-hooks
int(1) string(16) "10.40 2022-04-14"

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