Чистка файла кеев, php

$text = "
1 free mp3 downloads 158 000 000 17 899
2 mp3 1 220 000 000 10 878
3 mp3 audio books 24 500 000 10 168
4 mp3 players 80 900 000 7 174
5 mp3 downloads 109 000 000 6 127
6 free mp3 183 000 000 6 071
7 mp3 player 183 000 000 4 242
";

$piz = array();
$piz = explode("\r\n", $text);

for ($i=0; $i<=count($piz)-1;$i++)
{
if (trim($piz[$i]) != "") $rez[] = trim(preg_replace("#^\d|(?:\s\d).*#i"," ",$piz[$i]));
}

echo "

"; 
print_r($rez); 
echo "

";
?>