PHP Warning: Undefined array key “HTTP_USER_AGENT”

Fixing the Issue with Adding wp-hijri in the hijri-widgets.php File

Error Message:

[21-Dec-2024 10:30:11 UTC] PHP Warning:  Undefined array key "HTTP_USER_AGENT" in /home/mfkvhsiieh/public_html/wp-content/plugins/wp-hijri/include/hijri-widgets.php on line 317

Original Code with the Issue:

if (strpos($_SERVER['HTTP_USER_AGENT'], 'MSIE') !== false || stripos($_SERVER['HTTP_USER_AGENT'], 'camino') !== false || stripos($_SERVER['HTTP_USER_AGENT'], 'safari') !== false)
    $ak_title_separator = "\n";
else
    $ak_title_separator = ', ';

$ak_titles_for_day = array();
$ak_post_titles = $wpdb->get_results("SELECT ID, post_title, DAYOFMONTH(post_date) as d , MONTH(post_date) AS m,YEAR(post_date) AS y "
        . "FROM $wpdb->posts "
        . "WHERE post_date >= '{$gy1}-{$gm1}-{$gd1} 00:00:00' "
        . "AND post_date <= '{$gy2}-{$gm2}-{$gd2} 23:59:59' "
        . "AND post_type = 'post' AND post_status = 'publish'"
);
if ($ak_post_titles) {
    foreach ((array) $ak_post_titles as $ak_post_title) {

        /** This filter is documented in wp-includes/post-template.php */
        $post_title = esc_attr(apply_filters('the_title', $ak_post_title->post_title, $ak_post_title->ID));
        $dt=new \hijri\datetime($ak_post_title->y . '-' . zeroise($ak_post_title->m, 2) . '-' . zeroise($ak_post_title->d, 2), NULL, NULL, $hcal);
        $hd = $dt->format('_j');
        if (empty($ak_titles_for_day['day_' . $hd]))
            $ak_titles_for_day['day_' . $hd] = '';
        if (empty($ak_titles_for_day["$hd"])) // first one
            $ak_titles_for_day["$hd"] = $post_title;
        else
            $ak_titles_for_day["$hd"] .= $ak_title_separator . $post_title;
    }
}

Revised Code:

if (isset($_SERVER['HTTP_USER_AGENT']) && 
    (strpos($_SERVER['HTTP_USER_AGENT'], 'MSIE') !== false || 
     stripos($_SERVER['HTTP_USER_AGENT'], 'camino') !== false || 
     stripos($_SERVER['HTTP_USER_AGENT'], 'safari') !== false)) {
    $ak_title_separator = "\n";
} else {
    $ak_title_separator = ', ';
}

$ak_titles_for_day = array();
$ak_post_titles = $wpdb->get_results(
    "SELECT ID, post_title, DAYOFMONTH(post_date) as d, MONTH(post_date) AS m, YEAR(post_date) AS y " .
    "FROM $wpdb->posts " .
    "WHERE post_date >= '{$gy1}-{$gm1}-{$gd1} 00:00:00' " .
    "AND post_date <= '{$gy2}-{$gm2}-{$gd2} 23:59:59' " .
    "AND post_type = 'post' AND post_status = 'publish'"
);

if ($ak_post_titles) {
    foreach ((array) $ak_post_titles as $ak_post_title) {
        /** This filter is documented in wp-includes/post-template.php */
        $post_title = esc_attr(apply_filters('the_title', $ak_post_title->post_title, $ak_post_title->ID));
        $dt = new \hijri\datetime($ak_post_title->y . '-' . zeroise($ak_post_title->m, 2) . '-' . zeroise($ak_post_title->d, 2), NULL, NULL, $hcal);
        $hd = $dt->format('_j');
        if (empty($ak_titles_for_day['day_' . $hd])) {
            $ak_titles_for_day['day_' . $hd] = '';
        }
        if (empty($ak_titles_for_day["$hd"])) { // first one
            $ak_titles_for_day["$hd"] = $post_title;
        } else {
            $ak_titles_for_day["$hd"] .= $ak_title_separator . $post_title;
        }
    }
}

The page I need help with: [log in to see the link]