[Resolved] string name based on value of another string

[jboy161]

Hmmmm, not entirly sure how to explain this but, I'll have a go.

I want to echo a string based on the value of another string. ie $advts could equal a number of different things including p4u, lnk and cys. I then have a number of different strings such as $p4u, $lnk and $cys. I want to print the value of any one of these strings based on the value of $advts. I thought something like this would do the trick:

echo "$$advts";

but this results in giving me the name of a string rather than the value. Omg, that makes little sence at all, so, example,

$p4u = "hello world";
$advts = "p4u";
echo "$$advts";

should result in "hello world" being printed, insted i get "$p4u" being printed as php sees that first $ as being a piece of text and not the start of a string name.

Do i have to place something around the $advts part, to get this to work, can it even be done?

thanks,
jon.

[Installer]

echo $$advts;

[jboy161]

lol - i knew it would be something incredibly obvious like that.

[bradgrafelman]

You can also use braces to make PHP evaluate an expression, so to speak, like so:

$prefix = 'foo_';

${$prefix.'bar'} = 'foobar!';

echo $foo_bar; // foobar!