fopen() question

[Anon]

I know how to read, write and append to text files using fopen, etc. but can you delete lines? I can't figure out how. If so, how can I delete certain lines from a text file using PHP?

Thanks,

Seth

[nightowl]

You can't but there an easy work around. You can read the entire (original) content to a var and only rewrite those lines you want to the same file. That way, it looks like a line is erased...

[Anon]

How would you do this?

Thanks!

[nightowl]

well, something like...

(mind: it's a quicky!)

$fp = fopen("file.txt", "r");
$content = fread($fp);
fclose($fp);

// something to find the line to delete

while ($current_line = fgets($content, 1024)) {

if $current_line ... {
// when it doens't have to be deleted
$new_content .= $current_line
}

$fp = fopen("file.txt", "w");
fwrite($fp, $new_content);
fclose($fp);