How do I check an array for an existing element.

[chrisjwray]

Hello everybody.
Is there a function to check an array to see if it contains a specific element.
I basically need to check the $_GET array to see if a value has been passed, if it hasn't I need to use a default value. At present I get an error if I try to reference an element in the arry which doesnt exist as it may not have neeb passed to the page.

Thanks in advance

Chris W

 

[chrisjwray]

Sorry I solved this myself, just checked for a null.

if ($_GET['bob'] == null) echo "No argument passed";

I feel kinda stupid now.

 

[skiflyer]

You could also check
if (isset($_GET['bob']))
to see if the value is set... or my personal favorite

if (!isset($_GET['bob']) || '' == trim($_GET['bob']))

That way you catch pretty much everything

 

[Olavxxx]

If you have an array, with different keys and different values, and you want to filter out the ones you need, use:

key() and current()

http://no.php.net/current

http://no.php.net/key

Olav Alexander Mjelde

http://www.volvo-power.net

Admin & Webmaster

 

[chrisjwray]

Thanks for the help guys.