[RESOLVED] dynamic session vars? ahhh help~

sonuku

ok, im trying to minimise database queries, by using session vars... im a coldfusion coder, recently changed to a php coder...

so maybe im thinking completly wrong here...

but, i want the following to work...

//for this example... i'll just dummy the $threadid number and $var
$threadid = 2;
$var = "WORK BLARRDY!";


$_SESSION['lastseen_$threadid'] = $var;
echo "lastseen_". $threadid ." = ". $_SESSION['lastseen_$threadid'];
echo "hardcoded = ". $_SESSION['lastseen_2'];

but for some reason, it's not setting the session var "lastseen_2"

i've only been coding php for about 3 days now, and i have most of my website converted over to it... its just >____< this one thing wont work

dynamic session names... am i dreaming?

/me runs away screaming

mwichmann4

if you want a session var to stick through out the page try session_register("varname");

Enter the varname without the $ sign. And the var must be already on the page somewhere.

sonuku

will that work tho?

because the whole idea is that the name of the var is dynamic...

and if its dynamic, i have to recall it again...

and i dont knowhow to >_<

the full code im using (but doesnt work) is meant to update using session vars, wether or not a forum post is updated, old, or new...

so, if i use just "session_register("varname");" i run into the same problem...

i can't make the name of it dynamic.

it'd need to be:
$thisid = $row['id'];
session_register("forumlastseen_$thisid");

which wouldn't work...

arrgh
wait... what about...

while (... ...) {
$moo = "forumlastseen_". $thisid;
session_register("moo");"
}

does that set the NAME moo? or the value forumlastseen_$thisid as name?

______<

Orjan

what you want is to create your variablename, it's pretty easy, use the concat operator (.)

$SESSION["lastseen".$threadid];
which really means take the "_lastseen" and add the content in $threadid and use the concatenated string as variable/associative index

works tremendous for me.

TruckStuff

The problem with your existing code is that you are using single quotes instead of double quotes, i.e. $SESSION['lastseen$threadid'] vs. $SESSION["lastseen$threadid"]. PHP interprets anything in single quotes as being literal text. I am guessing you are probably seeing session variables called lastthread_threadid instead of lastthread_2? If you use double-quotes, PHP will attempt to evaluate anything inside the quotes, e.g. variables.

Or you could use the concat operator as previously mentioned. 🙂

sonuku

thanks ^_

/me = one step closer to world domination