Bug #75172 [Com]: $replace_pairs can't be used instead of $to and $from

Edit report at https://bugs.php.net/bug.php?id=75172&edit=1 ID: 75172 Comment by: kelunik@php.net Reported by: hyman dot omg at gmail dot com Summary: $replace_pairs can't be used instead of $to and $from Status: Not a bug Type: Bug Package: Strings related Operating System: centos6.5 PHP Version: 5.6.31 Block user comment: N Private report: N New Comment: These are replace pairs, see https://3v4l.org/3rfuV <?php $str = 'I loved you'; $from = 'love'; $to = 'lOvE'; var_dump($result1 = strtr($str, $from, $to)); var_dump($result2 = strtr($str, [$from[0] => $to[0], $from[1] => $to[1], $from[2] => $to[2], $from[3] => $to[3]])); var_dump($result2 = strtr($str, [$from => $to])); var_dump($result1===$result2);//false Previous Comments: ------------------------------------------------------------------------ [2017-09-08 10:33:07] requinix@php.net Thank you for taking the time to write to us, but this is not a bug. Please double-check the documentation available at http://www.php.net/manual/ and the instructions on how to report a bug at http://bugs.php.net/how-to-report.php Please read all the docs, not just parts of it. > If given three arguments, this function returns a copy of str where all > occurrences of each (single-byte) character in from have been translated to the > corresponding character in to > If given two arguments, the second should be an array in the form array('from' > => 'to', ...). The return value is a string where all the occurrences of the > array keys have been replaced by the corresponding values. That is, strtr has two different behaviors: character replacement by passing two strings or string replacement by passing one array. ------------------------------------------------------------------------ [2017-09-08 10:25:42] hyman dot omg at gmail dot com Description: ------------ In PHP Manual,we can find the message "The replace_pairs parameter may be used instead of to and from, in which case it's an array in the form array('from' => 'to', ...)".In fast,the results are different,it doesn't work as documented. Test script: --------------- <?php $str = 'I loved you'; $from = 'love'; $to = 'lOvE'; var_dump($result1 = strtr($str, $from, $to));//I lOvEd yOu var_dump($result2 = strtr($str, [$from=>$to]));//I lOvEd you var_dump($result1===$result2);//false Expected result: ---------------- I lOvEd you I lOvEd you true Actual result: -------------- I lOvEd yOu I lOvEd you false ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=75172&edit=1