WordPress的插件下拉菜单不保存选择

我创造了的WordPress主题允许用户选择按钮将链接，页面，通过使用网站中所有网页的下拉菜单中的小部件。WordPress的插件下拉菜单不保存选择

我使用wp_dropdown_pages()来创建下拉菜单。

目前一切正常工作在网站的前端，但是当您保存小部件时，下拉菜单中所做的选择不会被保存。

add_action('widgets_init', 'app_button_widget'); 


function app_button_widget() { 
register_widget('app_button_widget'); 
} 

class app_button_widget extends WP_Widget { 

function app_button_widget() { 
    $widget_ops = array('classname' => 'button-widget', 'description' => __('A widget that displays a button and supporting text ', 'example')); 
    $control_ops = array('width' => 300, 'height' => 350, 'id_base' => 'example-widget'); 
    $this->WP_Widget('example-widget', __('Button Widget', 'example'), $widget_ops, $control_ops); 
} 

function widget($args, $instance) { 
    extract($args); 

    //Our variables from the widget settings. 
    $title = apply_filters('widget_title', $instance['title']); 
    $url = $instance['url']; 
    $text = $instance['text']; 
    $new_window = isset($instance['new_window']) ? $instance['new_window'] : false; 

    echo $before_widget; 

    if ($new_window) 
     $target = ('_blank'); 

    // Display the widget title 
    if ($title) 
     echo '<p><a href="' . get_page_link($url) . '" target="'.$target.'"><button class="btn btn-large btn-danger span12" type="button">' . $title . '</button></a></p>'; 

    //Display the name 
    if ($name) 
     printf('<p>' . $text . '</p>'); 

    echo $after_widget; 
} 

//Update the widget 

function update($new_instance, $old_instance) { 
    $instance = $old_instance; 

    //Strip tags from title and name to remove HTML 
    $instance['title'] = strip_tags($new_instance['title']); 
    $instance['url'] = strip_tags($new_instance['url']); 
    $instance['text'] = strip_tags($new_instance['text']); 
    $instance['new_window'] = ($new_instance['new_window']); 

    return $instance; 
} 

function form($instance) { 

    //Default widget settings. 
    $defaults = array('title' => __('Sample Button Text', 'example'), 'url' => __('URL the button will link to', 'example'), 'text' => __('Call to action text', 'example'), 'show_info' => true); 
    $instance = wp_parse_args((array) $instance, $defaults); ?> 

    <p> 
     <label for="<?php echo $this->get_field_id('title'); ?>"><?php _e('Title:', 'example'); ?></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:90%;" /> 
    </p> 
    <p> 
     <p> 
     <label for="<?php echo $this->get_field_id('url'); ?>"><?php _e('Target URL:'); ?></label> 
     <?php wp_dropdown_pages(array('id' => $this->get_field_id('url'),'name' => $this->get_field_name('url'))); ?> 
    </p> 
    </p> 
    <p> 
     <label for="<?php echo $this->get_field_id('text'); ?>"><?php _e('Text:', 'example'); ?></label> 
     <input id="<?php echo $this->get_field_id('text'); ?>" name="<?php echo $this->get_field_name('text'); ?>" value="<?php echo $instance['text']; ?>" style="width:100%;" /> 
    </p> 
    <p> 
     <input class="checkbox" type="checkbox" <?php checked((bool) $instance['new_window'], true); ?> id="<?php echo $this->get_field_id('new_window'); ?>" name="<?php echo $this->get_field_name('new_window'); ?>" /> 
     <label for="<?php echo $this->get_field_id('new_window'); ?>"><?php _e('Open link in a new tab', 'example'); ?></label> 
    </p> 


<?php } ?>

如何保存选定的下拉值？

来源

2013-06-28 MagRat

我已经解决了未保存下拉菜单中的值的问题。

根据Wordpress Codex，有一个“选定”参数，我没有在wp_dropdown_array()中设置。

<?php wp_dropdown_pages(array('id' => $this->get_field_id('url'),'name' => $this->get_field_name('url'), 'selected' => $instance['url'])); ?>

来源

2013-07-01 15:14:31 MagRat

WordPress的插件下拉菜单不保存选择

回答

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