[SOLVED] Determine if all values in one flat array are found in another flat array

Determine if all values in one flat array are found in another flat array

I'm not sure which php function to use for this..

How can I check if one array has the values available in another array?

Fro example, I have a text input where CSV are submitted --- $str = "green, yellow, blue"

I use str_getcsv()to create an array of the string. Then I want to compare array 1 to array 2 seen below

$array2 = array("green", "yellow", "orange", "purple");

I'm comparing array 1 to array 2 to ensure that the submitted values are allowed. So if a value in array 1 does not exist in array 2, I want to return false. I tried the following but it doesn't work.

$array1 = str_getcsv($str); //create array of colors
$array2 = array("green", "yellow", "orange", "purple"); //allowed colors

if (!in_array($array1, $array2)) if value from array1 not in array2
{
    return FALSE;
} else {
    return TRUE;
}

Is this more complicated than I thought?

Solution