Re: Single Quotes vs Double Quotes

With all that's been said in mind ('$var' unparsed "$var" parsed). The rule of thumb I follow is, if it needs to be parsed (has a $variable or \n \r \t etc) then used double quotes, otherwise use single quotes... it conserves processing. -dd "Micro Brew" <microbrewclub@yahoo.com> wrote in message news:20030909040334.44065.qmail@web10306.mail.yahoo.com... > Hi everyone, > > Could somebody please explain to me the difference > between single quotes and double quotes in PHP. It > seems like they can be used interchangeably a lot in > PHP but not always. For example: > > This works: > header('Location: http://somedomain.com') > > This does not work: > header('Location: $url') > > This works: > header("Location: $url") > > > Why??? Sorry if this has been asked before, but I > didn't find a suitable answer in the archives. TIA. > > Mike > > __________________________________ > Do you Yahoo!? > Yahoo! SiteBuilder - Free, easy-to-use web site design software > http://sitebuilder.yahoo.com