How can I get in_array() to work with get_option()?

Question

I have two custom fields in my admin settings that allow me to enter two sets of valid zip codes ('woocommerce_local_delivery_zone_a' and 'woocommerce_local_delivery_zone_b').

I cannot figure out why this code isn't working:

    $codes_a = get_option( 'woocommerce_local_delivery_zone_a' );
$codes_b = get_option( 'woocommerce_local_delivery_zone_b' );

if ( in_array( "55410", array( $codes_a ) )) {
echo "Codes A";
} 

if ( in_array( "55410", array( $codes_b ) )) {
        echo "Codes B";
} 

If I echo $codes_a or $codes_b (outside of the "if" statement), the string of zip codes returns on the page. If I take that string and enter it directly where the variable is in if (in_array( "55410", array( NUMBERS HERE ))) the text I am trying to echo (Codes A or Codes B) works.

I also tried placing array( get_option( 'field_name')) directly in the if statement, and that didn't do anything either. Does in_array not work with getting admin custom fields?

Answer 1

If $codes_a is a string like this: 08847,032434,35545 then you need to use explode() to turn it into an array. I suspect what you really want is this:

if ( in_array( "55410", explode( ',', $codes_a ) ) {
    echo "Codes A";
}