RE: [PHP] Re: Value of $_* variables

> -----Original Message----- > From: CC Zona [mailto:email@cczona.com] > Sent: 06 March 2002 05:52 > To: php-general@lists.php.net > Subject: Re: [PHP] Re: Value of $_* variables > > > In article <php.general-87415@news.php.net>, > php-general@gremlins.com.hk (Jason Wong) wrote: > > > echo "$doo[dah]"; # is correct > > If constant 'dah' is defined, and its value is the name of > the key you wish > to access from array '$doo'. But if the string literall > 'dah' is itself > the name of the key you are trying to access, then the above is *not* > correct. For that, use: That's incorrect. I thought that, too, until a kindly PHP guru explained that $-interpolation inside double-quotes doesn't know about constants and ALWAYS interprets "$doo[dah]" the same as $doo['dah'] (And even as a straight reference, if the constant dah is undefined $doo[dah] is interpreted as $doo['dah'], with a -- usually suppressed -- warning being issued. But I do agree that this is bad practice and should never be relied upon.) Cheers! Mike --------------------------------------------------------------------- Mike Ford, Electronic Information Services Adviser, Learning Support Services, Learning & Information Services, JG125, James Graham Building, Leeds Metropolitan University, Beckett Park, LEEDS, LS6 3QS, United Kingdom Email: m.ford@lmu.ac.uk Tel: +44 113 283 2600 extn 4730 Fax: +44 113 283 3211