我收到一个商业化的WordPress插件，侧边栏菜单小工具的“意外}”语法错误，我似乎无法找出为什么会抛出这样的错误。小部件由以下内容组成，在类sidebar_menu_widget中的函数形式（$ instance）的右大括号中发生“Unexpected}”语法错误扩展WP_Widget：
<? ob_start();
/*
Plugin Name: Sidebar Menu Widget
Plugin URI: http://webloungeinc.com
Description: With this plugin you can display menu in sidebar according to nev menu.
Author: Weblounge inc.
Version: 1.0
Author URI: http://webloungeinc.com
*/
define( 'PLUGINS_PATH', plugin_dir_url(__FILE__) );
wp_register_style( 'style', PLUGINS_PATH . 'style.css' );
wp_enqueue_style ( 'style' );
function _getSidebarMenu($menu_id='',$post)
{
$menuItems = wp_get_nav_menu_items($menu_id);
foreach($menuItems as $menuItem)
{
if($menuItem->object_id == $post->ID && $menuItem->object == $post->post_type)
{
$parentMenuId = $menuItem->menu_item_parent;
$currentMenuId = $menuItem->ID;
}
}
$menuItems = (array) $menuItems;
$_cnt = 0;
foreach($menuItems as $_counter)
{
if($currentMenuId==$_counter->menu_item_parent)
{
$_cnt++;
}
}
foreach($menuItems as $kmi=>$vmi)
{
$vmi = (array) $vmi;
if($currentMenuId <> "")
{
if(in_array($currentMenuId,$vmi))
{
if($currentMenuId == $vmi[ID])
{
if($_cnt <> 0)
{
echo $content = '<li class="m_title">' . $vmi[title] . '</li>';
}
else
{
foreach($menuItems as $sis_menu)
{
// Parent
$sis_menu = (array) $sis_menu;
if($sis_menu[ID] == $parentMenuId)
{
echo $content = '<li class="m_title">' . $sis_menu[title] . '</li>';
}
if($sis_menu[menu_item_parent] == $parentMenuId)
{
$_other_cls = implode(" ",$sis_menu[classes]);
if($sis_menu[ID] == $currentMenuId)
{
$_cur_class = 'current_m_item';
}
else
{
$_cur_class = "";
}
echo $content = '<li><a href="' . $sis_menu[url]. '" class="'.$_other_cls." ".$_cur_class.'" rel="'.$sis_menu[xfn].'" target="'.$sis_menu[target].'">» ' . $sis_menu[title] . '</a></li>';
}
}
}
}
else
{
$_other_cls = implode(" ",$vmi[classes]);
echo $content = '<li><a href="' . $vmi[url]. '" class="'.$_other_cls." ".$_cur_class.'" rel="'.$vmi[xfn].'" target="'.$vmi[target].'">» ' . $vmi[title] . '</a></li>';
}
}
}
else
{
if($vmi[menu_item_parent]==0)
{
$_other_cls = implode(" ",$vmi[classes]);
echo $content = '<li><a href="' . $vmi[url]. '" class="'.$_other_cls." ".$_cur_class.'" rel="'.$vmi[xfn].'" target="'.$vmi[target].'">» ' . $vmi[title] . '</a></li>';
}
}
}
}
/* Custom Product Specials Widget */
class sidebar_menu_widget extends WP_Widget {
function sidebar_menu_widget() {
// widget actual processes
parent::WP_Widget(false, $name = 'Sidebar Menu', array(
'description' => 'Displays a Sidebar Menu'
));
}
function widget($args, $instance) {
global $post;
extract($args);
echo $before_widget;
$instance['title'] = apply_filters('widget_title', $instance['title'], $instance, $this->id_base);
if ( !empty($instance['title']) )
echo $before_title . $instance['title'] . $after_title;
echo '<ul class="menu ' . $instance['class'] . '">';
_getSidebarMenu($instance['nav_menu'],$post);
echo '</ul>';
echo $after_widget;
}
function update($new_instance, $old_instance) {
return $new_instance;
}
function form($instance) {
$title = isset( $instance['title'] ) ? $instance['title'] : '';
$class = isset( $instance['class'] ) ? $instance['class'] : '';
$nav_menu = isset( $instance['nav_menu'] ) ? $instance['nav_menu'] : '';
// Get menus
$menus = get_terms( 'nav_menu', array( 'hide_empty' => false ) );
// If no menus exists, direct the user to go and create some.
if ( !$menus ) {
echo '<p>'. sprintf( __('No menus have been created yet. <a href="%s">Create some</a>.'), admin_url('nav-menus.php') ) .'</p>';
return;
}
?>
<p>
<label for="<?php echo $this->get_field_id('title'); ?>"><?php _e('Title:') ?></label>
<input type="text" class="widefat" id="<?php echo $this->get_field_id('title'); ?>" name="<?php echo $this->get_field_name('title'); ?>" value="<?php echo $title; ?>" />
</p>
<p>
<label for="<?php echo $this->get_field_id('class'); ?>"><?php _e('Class:') ?></label>
<input type="text" class="widefat" id="<?php echo $this->get_field_id('class'); ?>" name="<?php echo $this->get_field_name('class'); ?>" value="<?php echo $class; ?>" />
</p>
<p>
<label for="<?php echo $this->get_field_id('nav_menu'); ?>"><?php _e('Select Menu:'); ?></label>
<select id="<?php echo $this->get_field_id('nav_menu'); ?>" name="<?php echo $this->get_field_name('nav_menu'); ?>">
<?php
foreach ( $menus as $menu ) {
$selected = $nav_menu == $menu->term_id ? ' selected="selected"' : '';
echo '<option'. $selected .' value="'. $menu->term_id .'">'. $menu->name .'</option>';
}
?>
</select>
</p>
<?php
----> }
}
add_action('widgets_init', 'register_sidebar_menu_widget');
function register_sidebar_menu_widget() {
register_widget('sidebar_menu_widget');
}
我用箭头表示错误的位置。经过大量调试后，我能想到的唯一可能导致这种错误的是在form（）函数中插入HTML。但是，我认为ob_start（）可以允许这样的中断发生，同时通过缓冲输出来维持php的流量？我是否需要在HTML之后进行某种ob_get_contents（）调用以允许这样的延续？
我即将重写该插件以避免中断，但令我困扰的是，这是一款商用插件，对我来说无法直接使用。任何帮助将不胜感激！感谢。
顺便说一句，我正在运行PHP 5.5.12，并且这个错误消息是通过XDebug提供给我的。如果您需要帮助，请告诉我您是否需要任何其他信息。