QueryString

[Anon]

How would I check if the queryString contains any value or if empty??

[Anon]

http://some.addy.com/index.php?page=iamjam

<?
if (isset($QUERY_STRING)) {
if ($page != "") {
switch($page) {
case "iamjam": include("aboutme.php"); break;
case "ifpageissomethingelse": include("anotherpage.php"); break;
}
}
else { include("default.php"); }
}
?>

Would this help?

[Anon]

Yes, that's the point. You should use function 'isset' every time when you have to check is there value in var.

Like:
--|--|--|--|--|--|--|--|--
if(isset($var1)) {
echo "There's a value";
}
--|--|--|--|--|--|--|--|--

The querystring isn't so important in PHP than it is in Perl (or at least I think so :-)). It's also a lot easier to check, you don't need to code those goddamn parsers, just check the environmental var $QUERY_STRING...

Hope this helps...

[toma42]

You should use function 'isset' every time when you have to check is there value in var.

Wrong. An easier way and more elegant way is to just do a if ($foo)

an empty string evaluates to false in php. If you want to know if $foo exists but has a value of nothing, then try isset or
$foo = '';
if ($foo === '') TRUE
if ($foo) FALSE
if ($foo == '') TRUE
if ($foo == 0) TRUE
if ($foo === FALSE) FALSE
if ($foo === TRUE) FALSE

[jbardin]

You should look into the empty() function as well

if (isset($var)) FALSE

$var = '';
if (isset($var)) TRUE
if (empty($var)) TRUE

unset($var);
if (empty($var)) TRUE