jidaikobo-shibata/a11yc

<?php
/**
 * * A11yc\Validate\Check\MetaRefresh
 *
 * @package    part of A11yc
 * @author     Jidaikobo Inc.
 * @license    The MIT License (MIT)
 * @copyright  Jidaikobo Inc.
 * @link       http://www.jidaikobo.com
 */
namespace A11yc\Validate\Check;

use A11yc\Element;
use A11yc\Validate;

class MetaRefresh extends Validate
{
    /**
     * meta refresh
     *
     * @param String $url
     * @return Void
     */
    public static function check($url)
    {
        Validate\Set::log($url, 'meta_refresh', self::$unspec, 5);
        if (Validate::$is_partial === true) return;
        Validate\Set::log($url, 'meta_refresh', self::$unspec, 1);

        $str = Element\Get::ignoredHtml($url);
        $ms = Element\Get::elementsByRe($str, 'ignores', 'tags');
        if ( ! $ms[0]) return;

        foreach ($ms[0] as $k => $v)
        {
            if ($ms[1][$k] != 'meta') continue;
            $attrs = Element\Get::attributes($v);

            if ( ! array_key_exists('http-equiv', $attrs)) continue;
            if ( ! array_key_exists('content', $attrs)) continue;
            if ( $attrs['http-equiv'] !== 'refresh') continue;

            $tstr = $ms[0][$k];

            // ignore zero refresh
            // see http://www.ciaj.or.jp/access/web/docs/WCAG-TECHS/H76.html
            $content = $attrs['content'];
            Validate\Set::errorAndLog(
                trim(substr($content, 0, strpos($content, ';'))) != '0' ||
                (strpos($content, ';') === false && trim($content) != '0'),
                $url,
                'meta_refresh',
                0,
                $tstr,
                $tstr
            );
        }
        static::addErrorToHtml($url, 'meta_refresh', static::$error_ids[$url], 'ignores');
    }
}