custom_wp_pagenavi works perfectly in all browsers ecxcept Safari - wordpress

Question

I am using the following code in my WP theme functions.php page and it works perfectly in all browsers but does not always show up in Safari, where it is intermittent.
When it does not show up on the page, it is in the code, if I look at the source code.
function custom_wp_pagenavi($before = '', $after = '', $prelabel = '', $nxtlabel = '', $pages_to_show = 5, $always_show = false) {
global $request, $posts_per_page, $wpdb, $paged;
if(empty($prelabel)) {
$prelabel = '<strong>«</strong>';
}
if(empty($nxtlabel)) {
$nxtlabel = '<strong>»</strong>';
}
$half_pages_to_show = round($pages_to_show/2);
if (!is_single()) {
if(!is_category()) {
preg_match('#FROM\s(.*)\sORDER BY#siU', $request, $matches);
} else {
preg_match('#FROM\s(.*)\sGROUP BY#siU', $request, $matches);
}
$fromwhere = $matches[1];
$numposts = $wpdb->get_var("SELECT COUNT(DISTINCT ID) FROM $fromwhere");
$max_page = ceil($numposts /$posts_per_page);
if(empty($paged)) {
$paged = 1;
}
if($max_page > 1 || $always_show) {
echo "$before <div class=\"wp-pagenavi\"><span class=\"pages\">Page $paged of $max_page:</span>";
if ($paged >= ($pages_to_show-1)) {
echo '« First';
}
previous_posts_link($prelabel);
for($i = $paged - $half_pages_to_show; $i <= $paged + $half_pages_to_show; $i++) {
if ($i >= 1 && $i <= $max_page) {
if($i == $paged) {
echo "<strong class='current'>$i</strong>";
} else {
echo ' '.$i.' ';
}
}
}
next_posts_link($nxtlabel, $max_page);
if (($paged+$half_pages_to_show) < ($max_page)) {
echo 'Last »';
}
echo "</div> $after";
}
}
}
<?php if (function_exists('custom_wp_pagenavi')) : ?>
<?php custom_wp_pagenavi(); ?>
Any suggestions would be greatly appreciated.