Searching a text file

[Anon]

Hey all. Newbie here, so be prepared...

Okay here it is. When a user enters my page I want to search a text file to see if his IP already exists.

I figured out how to record the users IP but I can't figure out how to search the text file to see if it's already there. (If it was there, then I wouldnt want to record it again. Get it?)

Thanks for the help.

[khaine]

<?

$filename=getcwd()."/textfile.txt";
$fpr=fopen($filename, "r") or die();
$datain=fread($fpr, filesize($filename) );
fclose($fpr);

$fpr=fopen($filename, "a") or die();
if ( strstr($datain, $ipnum) )
{
echo "already got you";
}
else
{
fwrite($fpw, $ipnum."\n");
}
fclose($fpw);
?>

Mark.