Bug #67977 [NEW]: Is it the expected behaviour?

From: admin at mvpro dot net Operating system: Linux Debian Wheezy x64 PHP version: 5.5.16 Package: *General Issues Bug Type: Bug Bug description:Is it the expected behaviour? Description: ------------ Hi. I have a question - is it the expected behaviour that lines like strtolower($str); Do not equals to $str = strtolower($str); ? The second line is correct and works fine, but first - is not. No errors produced, but also it just does not work :) $str most likely is being lowercased, but string $str stay untouched. The same is with other functions like wordwrap($text, 20, "<br />\n"); Do not equals to $newtext = wordwrap($text, 20, "<br />\n"); In all cases i expect, that action will be performed and string changes. However it does not happen. Thanks in advance. Test script: --------------- <?php $str = "Mary Had A Little Lamb and She LOVED It So"; $str = strtolower($str); echo $str . PHP_EOL; // Prints mary had a little lamb and she loved it so echo 'It works fine (all symbols are in lowercase)' . PHP_EOL; ?> <?php $str2 = "Mary Had A Little Lamb and She LOVED It So"; strtolower($str2); echo $str2 . PHP_EOL; // Prints Mary Had A Little Lamb and She LOVED It So echo 'It does not work (string is the same)' . PHP_EOL; ?> -- Edit bug report at https://bugs.php.net/bug.php?id=67977&edit=1 --