metabox在wordpress插件中无法正确显示

Question

我试图编写自己的插件，但每次出现错误或元框不能正确显示。

这是我的插件代码 请参阅它在代码头上显示的代码。我想在“编辑器”框下面显示它 我累了，但无法正确显示。

<?php 
/* 
    Plugin Name: party event 
    Plugin URI: http://careertracker.net 
    Version: 1.0 
    Author: Savan Paun 
    Description: event sample plugin 
*/ 
// Registers the new post type and taxonomy 
function wpt_event_posttype() { 
    register_post_type('events', 
     array(
      'labels' => array(
       'name' => __('Events'), 
       'singular_name' => __('Event'), 
       'add_new' => __('Add New Event'), 
       'add_new_item' => __('Add New Event'), 
       'edit_item' => __('Edit Event'), 
       'new_item' => __('Add New Event'), 
       'view_item' => __('View Event'), 
       'search_items' => __('Search Event'), 
       'not_found' => __('No events found'), 
       'not_found_in_trash' => __('No events found in trash') 
      ), 
      'public' => true, 
      'supports' => array('title', 'editor', 'thumbnail', 'comments'), 
      'capability_type' => 'post', 
      'rewrite' => array("slug" => "events"), // Permalinks format 
      'menu_position' => 5, 
      'register_meta_box_cb' => 'add_events_metaboxes' 
     ) 
    ); 
} 
add_action('init', 'wpt_event_posttype'); 

function add_events_metaboxes() 
{ 
    ?> 
    <table width=450 border=1> 
    <tr> 
    <td width=139>Foods</td> 
    <td width=295> 
    <label for=select></label> 
    <select name=food id=food> 
     <option value="Pizza">Pizza</option> 
     <option value="Hotdog">Hotdog</option> 
    </select> 
    </td> 
    </tr> 
    <tr> 
    <td>Tea</td> 
    <td><select name=tez id=tea> 
     <option value="Yes">Yes</option> 
     <option value="No">No</option> 
    </select></td> 
    </tr> 
    <tr> 
    <td>Person</td> 
    <td><label for=textfield></label> 
    <input type=text name=textfield id=textfield /></td> 
    </tr> 
    </table> 
    <?php 
} 
?> 

Answer 1

参阅以下完整的工作代码：

<?php 
/* 
    Plugin Name: party event 
    Plugin URI: http://careertracker.net 
    Version: 1.0 
    Author: Savan Paun 
    Description: event sample plugin 
*/ 
// Registers the new post type and taxonomy 
function wpt_event_posttype() { 
    register_post_type('events', 
     array(
      'labels' => array(
       'name' => __('Events'), 
       'singular_name' => __('Event'), 
       'add_new' => __('Add New Event'), 
       'add_new_item' => __('Add New Event'), 
       'edit_item' => __('Edit Event'), 
       'new_item' => __('Add New Event'), 
       'view_item' => __('View Event'), 
       'search_items' => __('Search Event'), 
       'not_found' => __('No events found'), 
       'not_found_in_trash' => __('No events found in trash') 
      ), 
      'public' => true, 
      'supports' => array('title', 'editor', 'thumbnail', 'comments'), 
      'capability_type' => 'post', 
      'rewrite' => array("slug" => "events"), // Permalinks format 
      'menu_position' => 5, 

     ) 
    ); 
} 
add_action('init', 'wpt_event_posttype'); 

add_action('admin_init', 'events_init'); 
add_action('save_post', 'event_meta_box_save'); 

function events_init() { 

    add_meta_box("events-information", "Events Information", "events_meta_options", "events", "normal", "high");  
} 

function events_meta_options($post) { 

    $values = get_post_custom($post->ID); 

    $person  = isset($values['person']) ? esc_attr($values['person'][0]) : ''; 

    $foods  = isset ($values['foods']) ? esc_attr($values['foods'][0]) : ''; 

    $tea  = isset ($values['tea']) ? esc_attr($values['tea'][0]) : ''; 

    wp_nonce_field('my_meta_box_nonce', 'meta_box_nonce'); 

    ?> 
    <table width="100%" border="0" class="options" cellspacing="5" cellpadding="5"> 

     <tr> 
      <td width="1%"> 
       <label for="foods"><?php _e('Foods', 'Events'); ?></label> 
      </td> 
      <td width="10%"> 
       <select name='foods' id='foods'> 
       <option value="Pizza" <?php if ($foods) selected($foods, 'Pizza'); ?>><?php _e('Pizza', 'Events')?></option> 
       <option value="Hotdog" <?php if ($foods) selected($foods, 'Hotdog'); ?>><?php _e('Hotdog', 'Events')?></option> 
       </select> 
      </td>   
     </tr> 

     <tr> 
      <td width="1%"> 
       <label for="tea"><?php _e('Tea', 'Events'); ?></label> 
      </td> 
      <td width="10%"> 
       <select name='tea' id='tea'> 
        <option value="Yes" <?php if ($tea) selected($tea, 'Yes'); ?>><?php _e('Yes', 'Events')?></option> 
        <option value="No" <?php if ($tea) selected($tea, 'No'); ?>><?php _e('No', 'Events')?></option> 
       </select>    
      </td>   
     </tr> 

     <tr> 
      <td width="1%"> 
       <label for="person"><?php _e('Person', 'Events'); ?></label> 
      </td> 
      <td width="10%"> 
       <input type="text" id="person" name="person" value="<?php echo $person; ?>" placeholder="<?php _e('Enter person name', 'Events'); ?>" style="width:90%; padding: 5px 10px; line-height: 20px;"/> 
      </td>   
     </tr> 


    </table> 
    <?php 
} 


function event_meta_box_save($post_id) 
{ 
    global $post; 

    $custom_meta_fields = array('person', 'foods', 'tea'); 

    // Bail if we're doing an auto save 
    if(defined('DOING_AUTOSAVE') && DOING_AUTOSAVE) return; 

    // if our nonce isn't there, or we can't verify it, bail 
    if(!isset($_POST['meta_box_nonce']) || !wp_verify_nonce($_POST['meta_box_nonce'], 'my_meta_box_nonce')) return; 

    // if our current user can't edit this post, bail 
    if(!current_user_can('edit_post')) return; 

    // now we can actually save the data 
    $allowed = array( 
       'a' => array( 
         'href' => array(), 
         'title' => array() 
        ), 
       'br' => array(), 
       'em' => array(), 
       'strong' => array(), 
       'p' => array(), 
       'span' => array(), 
       'div' => array(), 
      );  

    foreach($custom_meta_fields as $custom_meta_field){ 

     if(isset($_POST[$custom_meta_field]))   

      update_post_meta($post->ID, $custom_meta_field, wp_kses($_POST[$custom_meta_field], $allowed));  
    } 


} 

Answer 2

的问题是，你register_meta_box_cb回调函数应该是这样的：

function add_events_metaboxes() 
{ 
    add_meta_box( 
       'box_id', 
       'box_title', 
       'print_mb_so_23236266', 
       'events', 
       'normal', 
       'high' 
     ); 
} 

然后是功能print_meta_box()与HTML输出：

function print_mb_so_23236266() { 
    ?> 
    <table width="450" border="1"> 
    <!-- ETC --> 
    <?php 
} 

---

但是，也许你正在寻找的东西like this（不含元框和摆脱register_meta_box_cb）：

add_action('edit_form_after_editor', 'print_mb_so_23236266'); 

function print_mb_so_23236266($post) 
{ 
    if('events' !== $post->post_type) 
     return; 

    ?> 
    <table width="450" border="1"> 
    <tr> 
    <td width="139">Foods</td> 
    <td width="295"> 
    <label for="select"></label> 
    <select name="food" id="food"> 
     <option value="Pizza">Pizza</option> 
     <option value="Hotdog">Hotdog</option> 
    </select> 
    </td> 
    </tr> 
    <tr> 
    <td>Tea</td> 
    <td><select name="tez" id="tea"> 
     <option value="Yes">Yes</option> 
     <option value="No">No</option> 
    </select></td> 
    </tr> 
    <tr> 
    <td>Person</td> 
    <td><label for="textfield"></label> 
    <input type="text" name="textfield" id="textfield" /></td> 
    </tr> 
    </table> 
    <?php 
}