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<?php function commonCharacterCount($s1, $s2) { $a1 = str_split($s1); $a2 = str_split($s2); $common = array_intersect($a1, $a2); var_dump($a1, $a2); return count($common); } var_dump(str_split("aabcc")); // var_dump(commonCharacterCount("aabcc", "adcaa"));
Output for git.master, git.master_jit, rfc.property-hooks
array(5) { [0]=> string(1) "a" [1]=> string(1) "a" [2]=> string(1) "b" [3]=> string(1) "c" [4]=> string(1) "c" }

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