Deleting from a txt file

[99wesley99]

PHP Code: [Select]

<?
    $gb_file = fopen( "guests.txt", "a+" );
    if ( fwrite($gb_file, "$name\t$email\n") ) {
        $body  = "My message Text...\n";
        $body .= "$name\n";
        $body .= "$email\n";
        mail( "my_email@my_domain.edu","Guest Book Entry", $body );
        echo "Thanks!<br>\n";
    }
    else {
        echo "could not write file...<br>\n";
    }
?>

I would really like to be able to delete entries out of the txt file this writes to. Does anybody know how to do this or create functions to delete?

[RaythXC]

Duplicate post and in wrong section. Closed this one after replying to other one.