Nice number abbreviation (i.e. 12.5k)

new_gist_file.php

function abbreviate_number($num) {
  if ($num >= pow(10,3) AND $num < pow(10,4)) {
		return round($num/1000, 1).'k';
	}else if ($num >= pow(10,4) AND $num < pow(10,5)) {
		return round($num/1000, 1).'k';
	}else if ($num >= pow(10,5) AND $num < pow(10,6)) {
		return round($num/1000, 0).'k';
	}else if ($num >= pow(10,6) AND $num < pow(10,7)) {
		return round($num/1000000, 1).'m';
	}else if ($num >= pow(10,7) AND $num < pow(10,8)) {
		return round($num/1000000, 0).'m';
	}else if ($num >= pow(10,8)) {
		return round($num/1000000, 0).'m';
	}else{
		return $num;
	}
}

echo abbreviate_number(123456789);