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<?php $input = 'S1G5AB'; // given this $store = '5I6GAB'; // actually this $chars = str_split($input); var_dump($chars); $regex = str_replace(['S','5','G','6','1','I'], ['[S5]','[S5]','[G6]','[G6]','[I1]','[I1]'], $input); echo $regex; echo (0 < preg_match("/$regex/", $store) ? 'Match' : 'No match');
Output for git.master, git.master_jit, rfc.property-hooks
array(6) { [0]=> string(1) "S" [1]=> string(1) "1" [2]=> string(1) "G" [3]=> string(1) "5" [4]=> string(1) "A" [5]=> string(1) "B" } [S[S5]][[I1]1][G[G6]][S5]ABNo match

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