Re: Legal $_SESSION names

2009/5/22 tedd <tedd@sperling.com>: > Hi gang: > > While we're discussing what's legal in css, here's a couple of things I've > found about sessions. > > I found that starting a session with a number doesn't work. > > $myvar = $_SESSION['1myvar']; This won't work because $1myvar is not a valid variable. I believe the only reason this restriction is in place due to register_globals. I dunno if this restriction has been lifted since register_globals being removed from PHP6 but of all the "annoyances" in PHP this is a pretty minor example. > I also found that dumping a session to a variable with the same name may > cause problems, such as: > > $myvar = $_SESSION['myvar']; > > Regardless of what anyone may say to the contrary, it doesn't work > everywhere. I found that out the hard way. The fix is simply to use a > different name for the variable, such as: > > $my_var = $_SESSION['myvar']; I'm just guessing but I'd say this has to do with the way superglobals are created. Since 5.0.0 a configuration option called auto_globals_jit has existed and it defaults to being on. It causes the creation of superglobals to be delayed until they are actually used. I don't know how it interacts with register_globals (the manual says it'll be disabled if register_globals is on) but it makes sense to me that this issue is related to that. I'd say you've found a bug, but you'll need a repeatable example before you can report it. -Stuart -- http://stut.net/