Is there a way to check whether the third key exist?

[shelbytll]

Hi,

if have have the following variable:

$changes["T1"]["QQ"]["mandatory"]
$changes["T1"]["AA"]

Is there a way to check whether the current variable has the key "mandatory"?

Note that I'm looping thru $changes. For sure, there are the first 2 key. Just that the third key may or may not have.

[hkucsis]

in_array()

http://www.php.net/manual/en/function.in-array.php