Re: & in Query String

Derick Rethans wrote: > Jonathan Rosenberg wrote: >> I have a page with thumbnail pictures that can be clicked on to see >> a larger picture. Each picture is hyperlinked as follows >> >> <a HREF="show_pic.php?pic=blah&caption=Some+Text"> >> >> I access the 'pic' & 'caption' attributes with >> $_GET['pic'], etc. >> Pretty standard stuff. >> >> I have PHP set up so that error messages get mailed to a specified >> mail account. Every so often I get the following error message: >> >> Undefined index: caption >> In file /home/..../show_pic.php, line 64 >> page: /show_pic.php?pic=gb3.jpg&amp;caption=Some+Text >> >> The problem is obviously (I think) that the $_GET['caption'] is >> failing. True, if you receive &amp;caption in your URL, then the variable won't be called $_GET['caption'], but $_GET['amp;caption'], which (I think) is invalid because of the ;. >> >> What I can't figure out is why the '&' got turned into >> '&amp;'. Is a >> browser doing this? > Yes it is. No, it isn't. I sure hope there is no browser which turns & in &amp; in URL's. That would be very, very bad indeed! > Actually, you should specify the URL with the &amp; > yourself, like this: > > <a HREF="show_pic.php?pic=blah&amp;caption=Some+Text"> Of course not...this is a HREF tag, which can use & instead of &amp;. &amp; is for displaying purposes only, not for URL's. Following the tip from Marek, adjust your errormessage mailing thingy...add all the $_GET variables to it (print_r($_GET)). Some other notices maybe usefull to... Erwin