这个</p> 只是一个弥补缺失的浏览器人工制品</span>;

您的代码丢失. $args[\'link_after\'] 在两个位置；

更正的代码：

// WP_LINK_PAGES: Add prev and next links to a numbered link list 
add_filter(\'wp_link_pages_args\', \'wp_link_pages_args_prevnext_add\'); 

function wp_link_pages_args_prevnext_add($args) { 
    global $page, $numpages, $more, $pagenow; 
    $args[\'before\'] = \'<div id="link_wrap">\'; 
    $args[\'after\'] = \'</div>\'; 
    $args[\'link_before\'] = \'<span class="classlinks">\'; 
    $args[\'link_after\'] = \'</span>\'; 
    if($page-1) // there is a previous page 
        $args[\'before\'] .= \' \'. _wp_link_page($page-1) . $args[\'link_before\'] . $args[\'previouspagelink\'] . $args[\'link_after\'] . \'</a>\' . \' \' ; 
    if ($page<$numpages) // there is a next page 
        $args[\'after\'] = \' \'. _wp_link_page($page+1) . $args[\'link_before\'] . $args[\'nextpagelink\'] . $args[\'link_after\'] . \'</a></div>\' ; 
    return $args; 
}