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: mail at pmmaga dot 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: You are misreading the docs. It states: > 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. It says, "of each character". So all your lowercase "o" and "e" will be uppercased in your example. Previous Comments: ------------------------------------------------------------------------ [2017-09-08 10:33:47] kelunik@php.net 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 ------------------------------------------------------------------------ [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 array keys have been replaced by the corresponding values.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