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<?php $re = '/\b\d+(?:\.\d+)?(?=mcg\b)/'; $str = 'some text 0.25mcg some more text some text 25mcg some more text'; preg_match_all($re, $str, $matches); print_r($matches[0]);
Output for git.master, git.master_jit, rfc.property-hooks
Array ( [0] => 0.25 [1] => 25 )

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