WordPress的自定义帖子类型

Question

<?php 
/* 
Plugin Name: Opportunities 
Description: Custom Post Types for "The Oppourtunities Blog" website. 
Author: Sheju 
Author URI: http://www.localhost.com 
*/ 

if(! function_exists('Opportunity_create_post_type')) : 
    function Opportunity_create_post_type() { 
     $labels = array(
      'name' => __('Opportunity'), 
      'singular_name' => __('Opportunity'), 
      'add_new' => __('Add New Opportunity'), 
      'all_items' => __('All Opportunities'), 
      'add_new_item' => __('Add New Opportunity'), 
      'edit_item' => __('Edit Opportunity'), 
      'new_item' => __('New Opportunity'), 
      'view_item' => __('View Opportunity'), 
      'search_items' => __('Search Opportunities'), 
      'not_found' => __('No Opportunities found'), 
      'not_found_in_trash' => __('No Opportunities found in trash'), 
      'parent_item_colon' => __('Parent Opportunity') 
      //'menu_name' => default to 'name' 
     ); 
     $args = array(
      'labels' => $labels, 
      'public' => true, 
      'has_archive' => true, 
      'publicly_queryable' => true, 
      'query_var' => true, 
      'rewrite' => true, 
      'capability_type' => 'post', 
      'hierarchical' => false, 
      'supports' => array(
       'title', 
       'editor', 
       'excerpt', 
       //'thumbnail', 
       //'author', 
       //'trackbacks', 
       //'custom-fields', 
       //'comments', 
       'revisions', 
       //'page-attributes', // (menu order, hierarchical must be true to show Parent option) 
       //'post-formats', 
      ), 
      'taxonomies' => array('category', 'post_tag'), // add default post categories and tags 
      'menu_position' => 5, 
      'register_meta_box_cb' => 'Opportunity_add_post_type_metabox' 
     ); 
     register_post_type('Opportunity', $args); 
     //flush_rewrite_rules(); 

     register_taxonomy('Opportunity_category', // register custom taxonomy - Opportunity category 
      'Opportunity', 
      array('hierarchical' => true, 
       'label' => __('Opportunity categories') 
      ) 
     ); 
     register_taxonomy('Opportunity_tag', // register custom taxonomy - Opportunity tag 
      'Opportunity', 
      array('hierarchical' => false, 
       'label' => __('Opportunity tags') 
      ) 
     ); 
    } 
    add_action('init', 'Opportunity_create_post_type'); 


    function Opportunity_add_post_type_metabox() { // add the meta box 
     add_meta_box('Opportunity_metabox', 'More Details about Opportunity', 'Opportunity_metabox', 'Opportunity', 'normal'); 
    } 


    function Opportunity_metabox() { 
     global $post; 
     // Noncename needed to verify where the data originated 
     echo '<input type="hidden" name="Opportunity_post_noncename" id="Opportunity_post_noncename" value="' . wp_create_nonce(plugin_basename(__FILE__)) . '" />'; 

     // Get the data if its already been entered 
     $Opportunity_post_name = get_post_meta($post->ID, '_Opportunity_post_name', true); 
     $Opportunity_post_desc = get_post_meta($post->ID, '_Opportunity_post_desc', true); 
     $Opportunity_post_duration = get_post_meta($post->ID, '_Opportunity_post_duration', true); 

     // Echo out the field 
     ?> 

     <div class="width_full p_box"> 
      <p> 
       <label>Name<br> 
        <input type="text" name="Opportunity_post_name" class="widefat" value="<?php echo $Opportunity_post_name; ?>"> 
       </label> 
      </p> 
      <p><label>Description<br> 
        <textarea name="Opportunity_post_desc" class="widefat"><?php echo $Opportunity_post_desc; ?></textarea> 
       </label> 
      </p> 
      <p><label>Duration<br> 
        <textarea name="Opportunity_post_duration" class="widefat"><?php echo $Opportunity_post_duration; ?></textarea> 
       </label> 
      </p> 
     </div> 
    <?php 
    } 


    function Opportunity_post_save_meta($post_id, $post) { // save the data 
     // verify this came from the our screen and with proper authorization, 
     // because save_post can be triggered at other times 
     if(!wp_verify_nonce($_POST['Opportunity_post_noncename'], plugin_basename(__FILE__))) { 
      return $post->ID; 
     } 

     // is the user allowed to edit the post or page? 
     if(! current_user_can('edit_post', $post->ID)){ 
      return $post->ID; 
     } 
     // ok, we're authenticated: we need to find and save the data 
     // we'll put it into an array to make it easier to loop though 

     $Opportunity_post_meta['_Opportunity_post_name'] = $_POST['Opportunity_post_name']; 
     $Opportunity_post_meta['_Opportunity_post_desc'] = $_POST['Opportunity_post_desc']; 
     $Opportunity_post_meta['_Opportunity_post_duration'] = $_POST['Opportunity_post_duration']; 

     // add values as custom fields 
     foreach($Opportunity_post_meta as $key => $value) { // cycle through the $Opportunity_post_meta array 
      // if($post->post_type == 'revision') return; // don't store custom data twice 
      $value = implode(',', (array)$value); // if $value is an array, make it a CSV (unlikely) 
      if(get_post_meta($post->ID, $key, FALSE)) { // if the custom field already has a value 
       update_post_meta($post->ID, $key, $value); 
      } else { // if the custom field doesn't have a value 
       add_post_meta($post->ID, $key, $value); 
      } 
      if(!$value) { // delete if blank 
       delete_post_meta($post->ID, $key); 
      } 
     } 
    } 
    add_action('save_post', 'Opportunity_post_save_meta', 1, 2); // save the custom fields 
endif; // end of function_exists() 


if(! function_exists('view_Opportunities_posts')) : // output 
    function view_Opportunities_posts($num = 4, $do_shortcode = 1, $strip_shortcodes = 0) { 

     $args = array(
      'numberposts'  => $num, 
      'offset'   => 0, 
      //'category'  => , 
      'orderby'   => 'menu_order, post_title', // post_date, rand 
      'order'   => 'DESC', 
      //'include'   => , 
      //'exclude'   => , 
      //'meta_key'  => , 
      //'meta_value'  => , 
      'post_type'  => 'Opportunity', 
      //'post_mime_type' => , 
      //'post_parent'  => , 
      'post_status'  => 'publish', 
      'suppress_filters' => true 
     ); 

     $posts = get_posts($args); 

     $html = ''; 
     foreach ($posts as $post) { 
      $meta_name = get_post_meta($post->ID, '_echo"test"'.'_Opportunity_post_name', true); 
      $meta_desc = get_post_meta($post->ID, '_Opportunity_post_desc', true); 
      $meta_duration = get_post_meta($post->ID, '_Opportunity_post_duration', true); 


      /*if (!empty($meta_duration) && !empty($$meta_duration['_Opportunity_post_duration'])); 
      */ 

      /*<?php $my_meta = get_post_meta($post->ID,'_my_meta',TRUE); ?> 

      <?php if (!empty($my_meta) && !empty($my_meta['image_one'])): ?> 
    <div class="archive_images_one"><a href="<? echo $my_meta['image_one']; ?>" title="<? echo $my_meta['image_one_lightbox_title']; ?>" rel="lightbox"><img border="0" width="300px" height="200px" src="<? echo $my_meta['image_one']; ?>" alt="Android and iPhone App Development"></a></div> 
<?php endif; ?>*/ 




      //$img = get_the_post_thumbnail($post->ID, 'medium'); 
//   if(empty($img)) { 
//    $img = '<img src="'.plugins_url('/img/default.png', __FILE__).'">'; 
//   } 
// 
// 
//   if(has_post_thumbnail($post->ID)) { 
//    //$image = wp_get_attachment_image_src(get_post_thumbnail_id($post->ID), 'single-post-thumbnail'); 
//    //$img_url = $image[0]; 
//    $img = wp_get_attachment_image_src(get_post_thumbnail_id($post->ID), 'thumbnail'); 
//    $img_url = $img[0]; 
// 
//    //the_post_thumbnail('thumbnail'); /* thumbnail, medium, large, full, thumb-100, thumb-200, thumb-400, array(100,100) */ 
//   } 
// 
      $content = $post->post_content; 
      if($do_shortcode == 1) { 
       $content = do_shortcode($content); 
      } 
      if($strip_shortcodes == 1) { 
       $content = strip_shortcodes($content); 
      } 

      $html .= ' 
      <div> 
       <h3>'.$post->post_title.'</h3> 
       <div>'.$content.'</div> 
       <div> 
        <p>'.$meta_name.'</p> 
        <p>'.$meta_desc.'</p> 
        <p>'.$meta_duration.'</p> 
       </div> 

      </div> 
      '; 
     } 
     $html = '<div class="wrapper">'.$html.'</div>'; 
     return $html; 
    } 
endif; // end of function_exists() 
?> 

我需要为输出中的元字段添加自定义标签，只有在存在值的情况下。请帮助做到这一点。

我试图改变p标签末（像这样）：

  <h3>'.$post->post_title.'</h3> 
      <div> 
       <p>Name: '.$meta_name.'</p> 
       <p>Description: '.$meta_desc.'</p> 
      </div> 
      <div>'.$img.'</div> 
      <div>'.$content.'</div> 

Answer 1

不是100％肯定我知道你需要什么，但如果你希望只显示特定元，如果它有一个价值，你可以做这样的事情：

$html .= '<div>'; 
$html .= '<h3>' . $post->post_title . '</h3>'; 
$html .= '<div>' . $content . '</div>'; 
$html .= '<div>'; 
if(!empty($meta_name)) { 
    $html .= '<p>' . $meta_name . '</p>'; 
} 
if(!empty($meta_desc)) { 
    $html .= '<p>' . $meta_desc . '</p>'; 
} 
if(!empty($meta_duration)) { 
    $html .= '<p>' . $meta_duration . '</p>'; 
} 
$html .= '</div>'; 
$html .= '</div>';