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<?php $str1 = 'football'; $str2 = 'footboll'; $str_pos = strspn($str1 ^ $str2, "\0"); printf('First difference between two strings at position %d: "%s" vs "%s"', $str_pos, $str1[$str_pos], $str2[$str_pos]); ?>
Output for git.master, git.master_jit, rfc.property-hooks
First difference between two strings at position 5: "a" vs "o"

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