Remove duplicate lines from a file

[zubrag]

Remove duplicate lines from a file.

<?php

// filename
$filename = 'cars.txt';

$text = array_unique(file($filename));

$f = @fopen($filename,'w+');
if ($f) {
  fputs($f, join('',$text));
  fclose($f);
}

?>
Change cars.txt above to target file name. Result will be saved into the same file.
If you want to same result to another file replace $f = @fopen($filename,'w+');  with $f = @fopen('result-file-name.txt','w+');

[YellowNick]

Yes this is just what I need. I have a huge file with lots of duplicates.