in_array problem can any1 help me please...

[JustMe917]

Ok I looked on google and I have been up all night I am very close to working out my problem. I am having an issue with this in_array function. Here is my line of code:

Line 35: if in_array($ShipState, $Zone1States))

Here is my error:
Wrong datatype for second argument in call to in_array in c:\apache\htdocs\trials\payment.php on line 35

can anyone tell me why I can not check if the variable from a form is in the array?

here is more of the code:

$ShipState = $_POST[ShippingState];

// check zone 1 states
$Zone1States == explode(",", $options['Zone1']);

//check ship address to zone 1 states
if (in_array($ShipState, $Zone1States))<---line 35
{
$ZoneShipping = $_POST[ShippingPrice];
echo 'User\'s City Found in Zone1';
}

[hexburner]

You're comparing $Zone1States and explode(",", $options['Zone1']).
Use one =

$Zone1States = explode(",", $options['Zone1']); 

[JustMe917]

You're comparing $Zone1States and explode(",", $options['Zone1']).
Use one =

$Zone1States = explode(",", $options['Zone1']); 

TY bery bery much!!!!