WP-PageNavi 2.10 插件的BUG修正

function wp_pagenavi($before='', $after='', $prelabel='«', $nxtlabel='»') {
global $request, $posts_per_page, $wpdb, $paged;
if (!is_single()) {
if (get_query_var('post_type') == 'post') {
preg_match('#FROM (.*)\s+(GROUP|ORDER) BY#', $request, $matches);
$fromwhere = $matches[1];//var_dump($request);
if(preg_match('#(.*)\s+(GROUP|ORDER) BY#',$fromwhere,$m2)) {
$fromwhere = $m2[1];
}
$numposts = $wpdb->get_var("SELECT COUNT(DISTINCT ID) FROM $fromwhere");
$max_page = ceil($numposts /$posts_per_page);
}
else {
$max_page = 999999;
}
if(empty($paged)) {
$paged = 1;
}

if($max_page > 1) {
echo "$before 页数 ($max_page): <strong>";
if ($paged >= 4) {
echo '<a href="'.get_pagenum_link().'">&laquo; 首页</a> ... ';
}
previous_posts_link($prelabel);
for($i = $paged - 2; $i  <= $paged + 2; $i++) {
if ($i >= 1 && $i <= $max_page) {
if($i == $paged) {
echo "[$i]";
} else {
echo ' <a href="'.get_pagenum_link($i).'">'.$i.'</a> ';
}
}
}
next_posts_link($nxtlabel, $max_page);
if (($paged+2) < ($max_page)) {
echo ' ... <a href="'.get_pagenum_link($max_page).'">尾页 &raquo;</a>';
}
echo "</strong>$after";
}
}
}