将自定义窗口小部件拖动到窗口小部件区域并重新加载页面后，它就消失了。有什么想法吗？
<?php
add_action('widgets_init','register_postTypeWidget');
function register_postTypeWidget(){
register_widget('postType_widget');
}
class postType_widget extends WP_Widget {
function postType_widget() {
$widget_ops = array( 'classname' => 'postType_widget', 'description' => __('Display Posts by Post Type') );
$control_ops = array( 'width' => 300, 'height' => 350, 'id_base' => 'postType_widget' );
$this->WP_Widget( 'postType_widget', __('Posts by Post Type', 'postType_widget'), $widget_ops, $control_ops );
}
function widget($args, $instance) {
extract($args);
echo "hello world";
}
function update( $new_instance, $old_instance ) {
$instance = $old_instance;
$instance['title'] = strip_tags( $new_instance['title'] );
$instance['postTypeSelect'] = strip_tags( $new_instance['postTypeSelect'] );
$instance['postTypeNumber'] = strip_tags( $new_instance['postTypeNumber'] );
$instance['selectedPostTag'] = strip_tags( $new_instance['selectedPostTag'] );
$instance['showDate'] = strip_tags( $new_instance['showDate'] );
$instance['showAuthor'] = strip_tags( $new_instance['showAuthor'] );
return $instance;
}
function form( $instance ) {
$defaults = array( 'title' => __(''), 'postTypeSelect' => __(''), 'postType_number' => __(''), 'selected_postTag' => __(''), 'show_date' => __(''), 'show_author' => __('') );
$instance = wp_parse_args( (array) $instance, $defaults);
$args = '';
$output = 'object';
$post_types = get_post_types( $args, $output );
$posttags = get_tags();
?>
<p>
<label for="<?php echo $this->get_field_id( 'title' ); ?>"><?php _e('Title'); ?></label>
<input id="<?php echo $this->get_field_id( 'title' ); ?>" name="<?php echo $this->get_field_name( 'title' ); ?>" value="<?php echo $instance['title']; ?>" style="width:100%;" />
</p>
<p>
<label for="<?php echo $this->get_field_id( 'postTypeSelect' ); ?>"><?php _e('Select Post Type'); ?></label>
<?php
echo '<select name="postTypeSelect" style="width:100%;">';
echo '<option value="">Select Post Type</option>';
foreach($post_types as $post_type) {
if($instance['postTypeSelect'] == $post_type->name)
echo '<option value="'.$post_type->name.'" selected >'.$post_type->label.'</option>';
else
echo '<option value="'.$post_type->name.'" >'.$post_type->label.'</option>';
}
echo '</select>';
?>
</p>
<p>
<label for="<?php echo $this->get_field_id( 'postTypeNumber' ); ?>"><?php _e('Number of Posts'); ?></label>
<?php
echo '<select name="postTypeNumber" style="width:100%;">';
echo '<option value="">Number of Posts</option>';
for($x=1; $x < 11; $x++) {
if($instance['postTypeNumber'] == $x)
echo '<option value="'.$x.'" selected >'.$x.'</option>';
else
echo '<option value="'.$x.'" >'.$x.'</option>';
}
echo '</select>';
?>
</p>
<p>
<label for="<?php echo $this->get_field_id( 'selectedPostTag' ); ?>" style="display:block;width:100%;"><?php _e('Show Only Posts with These Tags (optional)'); ?></label>
<?php
foreach($posttags as $postTag){
if($instance['selected_postTag'] == $postTag->term_id)
echo '<input type="checkbox" name="selectedPostTag[]" value="'.$postTag->term_id.'" checked />'.$postTag->name.'</br>';
else
echo '<input type="checkbox" name="selectedPostTag[]" value="'.$postTag->term_id.'" />'.$postTag->name.'</br>';
}
?>
</p>
<p>
<label for="<?php echo $this->get_field_id( 'additional_options' ); ?>" style="display:block;width:100%;"><?php _e('Additional Options'); ?></label>
<?php if($instance['show_date'] == 'show_date'): ?>
<input type="checkbox" id="<?php echo $this->get_field_id( 'showDate' ); ?>" name="<?php echo $this->get_field_name( 'showDate' ); ?>" value="showDate" checked />Show Date</br>
<?php else: ?>
<input type="checkbox" id="<?php echo $this->get_field_id( 'showDate' ); ?>" name="<?php echo $this->get_field_name( 'showDate' ); ?>" value="showDate" />Show Date</br>
<?php endif; ?>
<?php if($instance['show_author'] == 'show_author'): ?>
<input type="checkbox" id="<?php echo $this->get_field_id( 'showAuthor' ); ?>" name="<?php echo $this->get_field_name( 'showAuthor' ); ?>" value="showAuthor" checked />Show Author</br>
<?php else: ?>
<input type="checkbox" id="<?php echo $this->get_field_id( 'showAuthor' ); ?>" name="<?php echo $this->get_field_name( 'showAuthor' ); ?>" value="showAuthor" />Show Author</br>
<?php endif; ?>
</p>
<?php
}
}
?>
答案 0 :(得分：0)
我认为您的窗口小部件的id_base值必须小写。查看WP_Widget的来源：
/**
* PHP5 constructor
*
* @param string $id_base Optional Base ID for the widget, lower case,
* if left empty a portion of the widget's class name will be used. Has to be unique.
<snip>
*/
function __construct( $id_base, $name, $widget_options = array(), $control_options = array() ) {
所以这样的东西应该在你的构造函数中起作用（注意我也更改了$id_base中$control_ops的大小写）：
function postType_widget() {
$widget_ops = array( 'classname' => 'postType_widget', 'description' => __('Display Posts by Post Type') );
$control_ops = array( 'width' => 300, 'height' => 350, 'id_base' => 'posttype_widget' );
$this->WP_Widget( 'posttype_widget', __('Posts by Post Type', 'postType_widget'), $widget_ops, $control_ops );
}