Unique combinations from two checkbox fields

• [email protected]

• July 7, 2017 at 10:28 pm

I have two checkbox fields:

AAA (with the choices A, B, C)
BBB (with the choices 10, 20, 30)

In made in the front end the followoing choices:

In AAA: A, B
In BBB: 20, 30

Now I want to calculate the unique combinations, so I want (as text): A20, B20, B20, B30, also A20 B20 B20 B30 will do, the comma is not needed.
I made this:

function class_tijd($post_id)
{
    $class = get_field('AAA');
    $tijd = get_field('BBB');
    
   foreach ($class as $value1) {
    	$value1 = implode(' ', $class);
    		foreach ($tijd as $value2) {
    			
    			$value2 = implode(' ', $tijd);
    			
    		}
    	$value = $value1 . $value2;	
    }
    
    $field_name = "classtijd";
    update_field($field_name, $value, $post_id);

The result I get is: A B20 30

I found out that I could solve yhis with possible array_merge, but can not find the right way to get it done. Any ideas?

• John Huebner

• July 7, 2017 at 11:58 pm

The only way to do this is to loop through one array and a nested loop through the second array and concatenate each value individually. There is no single php function that will automatically do this work.

$class = get_field('AAA');
$tijd = get_field('BBB');

$value = array();
foreach ($class as $a) {
  foreach ($tijd as $b) {
    $value[] = $a.$b;
  }
}
$value = implode(', ', $value);

• [email protected]

• July 8, 2017 at 4:00 pm

Thanks a lot, that was the solution I was looking for!

Peter