【php】metaタグのgeneratorをチェックする

check_cms.php

<?php
$lines = file('url.txt', FILE_IGNORE_NEW_LINES);

foreach ($lines as $line) {
    $val = explode(',', $line);
    $tags = get_meta_tags($val[1]);
    if (isset($tags['generator'])) {
        echo $val[0] . "は " . $tags['generator'] . " です\n";
    }
}