default variable value

[lurisia]

Does php provide a built in way to use a variable's current value if
that variable is already set but to use a default value otherwise.
That is, a more compact syntax for:

$some_var = isset("$some_va r") ? $some_var : "default value";

Thanks,
lurisia

[Chung Leong]

Re: default variable value

For class variables, yes. For function parameters, yes. In the global scope,
no, as it makes little sense.

If you're talking about GET and PUT variables, you can write a little
function that does that. I use a function I call "StickyVariable " in a lot
of situations where state values are required:

function StickyVariable( $name, $default = null) {
if(isset($_REQU EST[$name])) {
$GLOBALS[$name] = $_SESSION[$name] = $_REQUEST[$name];
}
else if(isset($_SESS ION[$name])) {
$GLOBALS[$name] = $_SESSION[$name];
}
else {
$GLOBALS[$name] = $default;
}
}

....

StickyVariable( "sort_type" , SORT_BY_DATE);
StickyVariable( "sort_dir", SORT_ASCENING);

Uzytkownik "lurisia" <hello@hello.co m> napisal w wiadomosci
news:depq109j0u 14c02tdu52mdl5j eugjn8k8i@4ax.c om...[color=blue]
> Does php provide a built in way to use a variable's current value if
> that variable is already set but to use a default value otherwise.
> That is, a more compact syntax for:
>
> $some_var = isset("$some_va r") ? $some_var : "default value";
>
> Thanks,
> lurisia[/color]