$lines = gzfile('d:\\3LData.txt.gz');
echo "<pre>";
print_r($lines);
echo "</pre>";
/*
run:
Array
(
[0] => aaa
[1] => aab
[2] => aac
[3] => aad
[4] => aae
[5] => aaf
[6] => aag
[7] => aah
[8] => aai
[9] => aaj
[10] => aak
[11] => aal
[12] => aam
[13] => aan
[14] => aao
[15] => aap
[16] => aaq
[17] => aar
[18] => aas
[19] => aat
...
*/