extract comments

<?php

$separator = '//';
$file = '';

foreach ($argv as $argNum => $argVal) {
    if ($argVal == '-file') {
        $file = $argv[$argNum + 1];
    }
    if ($argVal == '-separator') {
        $separator = $argv[$argNum + 1] . ' ';
    }
}

$content = file($file);


$res = array();
foreach ($content as $line) {
    $line = trim($line);
    if (false !== strpos($line, $separator)) {
        $res[] = str_replace($separator, '', $line);
    }
}

$res = iconv('windows-1251', 'utf8', implode(PHP_EOL, $res));
echo $res;