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<?php $value = 0.12; $regexp = '/^[0-9]+(\.[0-9][0-9]?)?$/'; preg_match($regexp, $value, $matches); var_dump($matches);
Output for git.master, git.master_jit, rfc.property-hooks
array(2) { [0]=> string(4) "0.12" [1]=> string(3) ".12" }

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