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<?php $str1 = 'The Quick Brown Fox Jumps'; $str2 = 'The Quick Brown Fox JuMps'; echo 'String1-'.$str1.'<br />String2-'.$str2.'<br />'; $spos = strspn($str1 ^ $str2, "\0"); printf('First difference at position %d: "%s" vs "%s"',$spos, $str1[$spos], $str2[$spos]); ?>

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