Creating an array

[zzz]

I'm having a long day and am experiencing major mental block.

I have a variable that I need to turn into an array.

I have

$var = 899;

I need it to be:

[groupA] => Array([899] => 899)

The reaso I do that is because I later only work with that kind off array values, and my code is already written to check if a particular value is in array

if (in_array($newVar, $_SESSION['groupA']))

[NogDog]

Do you mean:

$newVar = array('groupA' => array($var => $var));

...or...

$newVar['groupA'][$var] = $var;

?
Though it still seems odd (as well as repetitive and redundant) to use the same value for both the key and value of a single array element.

[ucffool]

set your array:

$array = array();

assign the variable's value to that array in an indexed fashion (since in_array() checks values only, the key is irrelevant and the key has more restrictions on variable type than the value does).

$array[] = $var;