Help with checking offset

[EchoFool]

If there is an automated script which creates an array but there is no parametres that match to create this "array" is there a way to check that the array is in simple words... blank?

 

Because at the moment after my while loop which creates the array i have:

$_SESSION['MissionID'] = $a[0];

 

But if the array wasn't greated because all the rows have been used which can happen then obviously $a[0]; won't exist.

 

So i end up with:

Notice: Undefined offset: 0 in C:\xampp\htdocs\test.php on line 6431

 

So was wondering if there was a way to "check" if the array is blank and if it is then skip it.

 

I tried this:

<?php
If($a[0]>0){
// do it
}Else { // do not 
}

 

Didn't work though. Any suggestions?

But that didn't work.

 

 

[rhodesa]

<?php
if(is_array($a) && isset($a[0]) && $a[0]>0){
  // do it
}else {
  // do not 
}
?>