Extremely basic PHP help needed.

[chodadog]

Okay, i've already got this..

<?php echo $HTTP_GET_VARS['w']; ?>

Which is fine, but i'd like some sort of if/else thingy. Example, if w is null (index.php?w=), then make w=9999999 or if the w variable isn't passed at all (index.php), then make w=9999999.

Hopefully that actually makes sense. I'm so very clueless when it comes to this shit.

[psyko514]

<? if (!isset($w)) { $w = 999999; } ?>

[SilverTab]

If w is a variable you can check with

if (empty($w))
{
...
}
else
{
...
}

not sure if I get what you mean tough!

[chodadog]

SilverTab, thanks. That's exactly what i was looking for. psyko, thanks too, but not exactly sure what to do with what you gave me! But thanks anyways. Sorry for being so unclear in the first place.

[SilverTab]

Np !...glad I could be helpful

[psyko514]

Chodadog... the isset() function checks to see if the variable has been set (if it has a value). if so, it gives a result of TRUE.

the code i posted checks to see if W has been given a value, and if not, it gives W a value of 99999 or whatever else you want.

i posted it in one line, but it could be broken into several lines

<?php
if (!isset($w)) {
   $w = 999999; 
} 
?>

the empty() function does more or less the same thing... except that if W = 0, isset() will return TRUE but empty() will return FALSE

[SilverTab]

Originally posted by psyko514

the empty() function does more or less the same thing... except that if W = 0, isset() will return TRUE but empty() will return FALSE

Yup..Always more than one ways to get to the same result in programming

[Cogitator]

I always create a function like:

<?
function GetValue($var, $default) {
    if (isset($var) {
        return $var;
    } else {
        return $default;
    }
}
?>

// you would use it as follows:

<?
echo GetValue($w, 999999);
?>

[Bad B0y]

another way(not tested btw) just cuz i have nothing better to do after i've watered the plants and taken my special pills.

$w = empty($w) ? 999999 : $w;