Read a file backwards line by line using fseek

Question

How do I read a file backwards line by line using fseek?

code can be helpful. must be cross platform and pure php.

many thanks in advance

regards

Answer 1

This code read file backwards. This code ignore modifications on reading, example apache access.log new lines on procressing.

$f = fopen('FILE', 'r');

fseek($f, 0, SEEK_END);

$pos = ftell($f);
$pos--;

while ($pos > 0) {
    $chr = fgetc($f);
    $pos --;

    fseek($f, $pos);

    if ($chr == PHP_EOL) {
        YOUR_OWN_FUNCTION($rivi);
        $rivi = NULL;
        continue;
    }

    $rivi = $chr.$rivi;
}

fclose($f);