note 63269 added to function.substr

It might be obvious to some but I took some time to figure it out that you can't call <?php $text = substr($text, 0, -0); ?> and expect $text to be unchanged. A bit of context might make the issue clearer. I'm calculating how many characters I need to chop of the end of the string and them I call substr as <?php $text = substr($text, 0, -$charactersToChop); ?> Sometimes $charactersToChop is set to 0 and in this case I wanted $text to be unchanged. The problem is that in this case $text gets set to an empty string. Why? Because -0 is the same as 0 and substr($text, 0, 0) obviously returns an empty string. In case someone want a fix: <?php if ($charactersToChop) { $text = substr($text, 0, -$charactersToChop); } ?> That's it. ---- Server IP: 200.185.109.101 Probable Submitter: 200.140.12.19 (proxied: unknown) ---- X-Spam-Status: No, hits=3.1 required=5.0 tests=DATE_MISSING,FROM_NO_LOWER autolearn=no version=2.64 ---- Manual Page -- http://www.php.net/manual/en/function.substr.php Edit -- http://master.php.net/note/edit/63269 Del: integrated -- http://master.php.net/note/delete/63269/integrated Del: useless -- http://master.php.net/note/delete/63269/useless Del: bad code -- http://master.php.net/note/delete/63269/bad+code Del: spam -- http://master.php.net/note/delete/63269/spam Del: non-english -- http://master.php.net/note/delete/63269/non-english Del: in docs -- http://master.php.net/note/delete/63269/in+docs Del: other reasons-- http://master.php.net/note/delete/63269 Reject -- http://master.php.net/note/reject/63269 Search -- http://master.php.net/manage/user-notes.php