function get_base_font_size() { global $g_font_size; for ($i = 0; $i < count($g_font_size); $i++) { $unit = value::unit_from_string($g_font_size[$i]); if ($unit != UNIT_EX && $unit != UNIT_EM) { $font_size = units2pt($g_font_size[$i]); for ($j = $i - 1; $j >= 0; $j--) { $font_size = units2pt($g_font_size[$j], $font_size); } return $font_size; } } return 0; }