MariuszEm

Man, you’re life saver;)
Works like a charm now.

And I got it. ACF makes meta value looks like:
a:3:{i:0;s:10:"value1";i:1;s:11:"value2";i:2;s:15:"value3";
So it is why I can’t use “=” instead of LIKE. It is also why I can’t use IN.

IN works like “=”, but it works in array. Is there LIKE for arrays?

No error, but no results also.

$query_array = array('relation' => 'OR');
    array_push($query_array,
    array(
      'key' => 'filter1',
      'value' => array('value1', 'value2', 'value3'),
      'compare' => 'IN'
    )
  );

No results.

$query_array = array('relation' => 'OR');
    array_push($query_array,
    array(
      'key' => 'filter1',
      'value' => 'value3',
      'compare' => 'LIKE'
    )
  );

Works like it should (but with one filter), but when I use array(‘value1’, ‘value2’, ‘value3’) i got nothing again.

PS. I am filtering by ACF value.

Did it.
Just make it:

array(
      'key' => 'filter1',
      'value' => 'value1' OR 'value2' OR 'value3',
      'compare' => 'LIKE'
    )

Now I need to put values dynamicly.