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<?php $regex = "/(?<![\d.])(\d{1,2}'|\d{0,2}\.\d{1,2}')?(?![\d.](?=\d))/"; $string = "thee hight is 15'"; preg_match_all($regex,$string,$matches); var_dump($matches); ?>
Output for git.master, git.master_jit, rfc.property-hooks
array(2) { [0]=> array(16) { [0]=> string(0) "" [1]=> string(0) "" [2]=> string(0) "" [3]=> string(0) "" [4]=> string(0) "" [5]=> string(0) "" [6]=> string(0) "" [7]=> string(0) "" [8]=> string(0) "" [9]=> string(0) "" [10]=> string(0) "" [11]=> string(0) "" [12]=> string(0) "" [13]=> string(0) "" [14]=> string(3) "15'" [15]=> string(0) "" } [1]=> array(16) { [0]=> string(0) "" [1]=> string(0) "" [2]=> string(0) "" [3]=> string(0) "" [4]=> string(0) "" [5]=> string(0) "" [6]=> string(0) "" [7]=> string(0) "" [8]=> string(0) "" [9]=> string(0) "" [10]=> string(0) "" [11]=> string(0) "" [12]=> string(0) "" [13]=> string(0) "" [14]=> string(3) "15'" [15]=> string(0) "" } }

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