basic tail method

tail.php

function tail($fh, $max_length=10) {
    
    $tailed = array();
    
    fseek($fh, -2, SEEK_END);
    $stop = ftell($fh) + 2;
    
    while (ftell($fh) >= 0 && count($tailed) < $max_length) {
        
        $c = fgetc($fh);
        if ($c == PHP_EOL) {
            $current = ftell($fh);
            $start = $current;
            fseek($fh, $start);
            $line = fread($fh, $stop - $start);
            array_unshift($tailed, $line);
            $stop = $start;
            fseek($fh, $current);
        }
        fseek($fh, ftell($fh) - 2, SEEK_SET);
    }
    
    return $tailed;
}