Using preg_match on a multidimensional array to return key values arrays

Question

I have an array that is structured as such:

$data = array(
    \"abc\"=>array(
            \"label\" => \"abc\",
            \"value\" => \"def\",
          


        

Answer 1

preg_grep('/needle/iu', array_column($haystack, "columnName", "keyName" ) );

Case-insensitive unicode grep on column columnName in array $haystack