in_array() and multidimensional array

Question

I use in_array() to check whether a value exists in an array like below,

$a = array(\"Mac\", \"NT\", \"Irix\", \"Linux\");
if (in_array(\"Irix\"         


        

Answer 1

This will do it:

foreach($b as $value)
{
    if(in_array("Irix", $value, true))
    {
        echo "Got Irix";
    }
}

in_array only operates on a one dimensional array, so you need to loop over each sub array and run in_array on each.

As others have noted, this will only for for a 2-dimensional array. If you have more nested arrays, a recursive version would be better. See the other answers for examples of that.