Question

I am quite bad at php. I have a Multicheckbox that outputs an array this way:

Array
  (
   [value1] => true
   [value2] => false
   [value2] => false
   [value4] => false
   [value5] => true
   [value6] => false
  )

I would like to return an array with only the elements (values) that are true. Then I will apply this:

    $list_of_true_values = explode(',', $array_i_am_looking_for);
    return $list_of_true_values;

As in the end I want to return this: value1,value5.

Thanks’

Answer 1

As Rajat has said you can use the array_keys() function. I’d also add that if you’re looking to get an output of value1,value5, you shouldn’t use explode(), but rather, it’s duel, implode().

return implode(",", array_keys($array, true));

Is all you need.

---

As per your comment, if you’d like to wrap the keys in single quotes:

$keys = array_keys($array, true);
array_walk($keys, function(&$v, $k){$v = "'" . $v . "'";});
return (implode(",", $keys));

This is called Anonymous (Lambda) Syntax.