上一篇文章，我们在WordPress后台文章编辑页面添加了自定义面板，并且在自定义面板中可以输入关键词和描述信息，但是我们仅仅使用了一个textarea文本域表单，这在实际应用中是远远不够的，实际应用我们可能需要文本框、文本域、单选框、复选框、下拉选择框、图片上传、甚至是wordpress自带的文本编辑器或者自己配置的文本编辑器以及各种带js特效的应用。
今天我们给自定义面板添加简单的表单：文本框、文本域、单选框、复选框、下拉选择框。
我们继续使用昨天的文件，改进昨天的代码。
首先准备工作：
先将昨天新建的metabox.PHP文件中的代码清楚，准备字段数组：我们可以参考前面后台教程中配置选项数组的方法来配置数据项：设置选项类文件使用方法：
$new_meta_boxes = array( "title" => array( "name" => "_meta_title", "std" => "", "title" => "标题", "type"=>"title"), "keywords" => array( "name" => "_meta_keywords", "std" => "", "title" => "关键字", "type"=>"text"), "description" => array( "name" => "_meta_description", "std" => "", "title" => "描述", "type"=>"textarea"), "category" => array( "name" => "_meta_cate", "std" => "", "title" => "选择分类", "subtype"=> "cat", "type"=>"dropdown"), "radio" => array( "name" => "_meta_radio", "std" => 1, "title" => "单选框", "buttons" => array('Yes','No'), "type"=>"radio"), "checkbox" => array( "name" => "_meta_checkbox", "std" => 1, "title" => "复选框", "type"=>"checkbox"), ); function new_meta_boxes() { global $post, $new_meta_boxes; foreach($new_meta_boxes as $meta_box) { //获取保存的是 $meta_box_value = get_post_meta($post->ID, $meta_box['name'].'_value', true); if($meta_box_value != "") $meta_box['std'] = $meta_box_value;//将默认值替换为以保存的值 echo'<input type="hidden" name="'.$meta_box['name'].'_noncename" id="'.$meta_box['name'].'_noncename" value="'.wp_create_nonce( plugin_basename(__FILE__) ).'" />'; //通过选择类型输出不同的HTML代码 switch ( $meta_box['type'] ){ case 'title': echo'<h4>'.$meta_box['title'].'</h4>'; break; case 'text': echo'<h4>'.$meta_box['title'].'</h4>'; echo '<input type="text" size="40" name="'.$meta_box['name'].'_value" value="'.$meta_box['std'].'" /><br />'; break; case 'textarea': echo'<h4>'.$meta_box['title'].'</h4>'; echo '<textarea cols="60" rows="3" name="'.$meta_box['name'].'_value">'.$meta_box['std'].'</textarea><br />'; break; case 'dropdown': echo'<h4>'.$meta_box['title'].'</h4>'; if($meta_box['subtype'] == 'cat'){ $select = 'Select category'; $entries = get_categories('title_li=&orderby=name&hide_empty=0');//获取分类 } echo '<p><select name="'.$meta_box['name'].'_value"> '; echo '<option value="">'.$select .'</option> '; foreach ($entries as $key => $entry){ $id = $entry->term_id; $title = $entry->name; if ( $meta_box['std'] == $id ){ $selected = "selected='selected'"; }else{ $selected = ""; } echo "<option $selected value='". $id."'>". $title."</option>"; } echo '</select><br />'; break; case 'radio': echo'<h4>'.$meta_box['title'].'</h4>'; $counter = 1; foreach( $meta_box['buttons'] as $radiobutton ) { $checked =""; if(isset($meta_box['std']) && $meta_box['std'] == $counter) { $checked = 'checked = "checked"'; } echo '<input '.$checked.' type="radio" class="kcheck" value="'.$counter.'" name="'.$meta_box['name'].'_value"/>'.$radiobutton; $counter++; } break; case 'checkbox': echo'<h4>'.$meta_box['title'].'</h4>'; if( isset($meta_box['std']) && $meta_box['std'] == 'true' ) $checked = 'checked = "checked"'; else $checked = ''; echo '<input type="checkbox" name="'.$meta_box['name'].'_value" value="true" '.$checked.' />'; break; } } } function create_meta_box() { global $theme_name; if ( function_exists('add_meta_box') ) { add_meta_box( 'new-meta-boxes', '自定义模块', 'new_meta_boxes', 'post', 'normal', 'high' ); } } function save_postdata( $post_id ) { global $post, $new_meta_boxes; foreach($new_meta_boxes as $meta_box) { if ( !wp_verify_nonce( $_POST[$meta_box['name'].'_noncename'], plugin_basename(__FILE__) )) { return $post_id; } if ( 'page' == $_POST['post_type'] ) { if ( !current_user_can( 'edit_page', $post_id )) return $post_id; } else { if ( !current_user_can( 'edit_post', $post_id )) return $post_id; } $data = $_POST[$meta_box['name'].'_value']; if(get_post_meta($post_id, $meta_box['name'].'_value') == "") add_post_meta($post_id, $meta_box['name'].'_value', $data, true); elseif($data != get_post_meta($post_id, $meta_box['name'].'_value', true)) update_post_meta($post_id, $meta_box['name'].'_value', $data); elseif($data == "") delete_post_meta($post_id, $meta_box['name'].'_value', get_post_meta($post_id, $meta_box['name'].'_value', true)); } } add_action('admin_menu', 'create_meta_box'); add_action('save_post', 'save_postdata'); $ashu_eitor = get_post_meta($post->ID, "_meta_keywords_value", true);
二、创建(显示)面板内容的函数
$new_meta_boxes = array( "title" => array( "name" => "_meta_title", "std" => "", "title" => "标题", "type"=>"title"), "keywords" => array( "name" => "_meta_keywords", "std" => "", "title" => "关键字", "type"=>"text"), "description" => array( "name" => "_meta_description", "std" => "", "title" => "描述", "type"=>"textarea"), "category" => array( "name" => "_meta_cate", "std" => "", "title" => "选择分类", "subtype"=> "cat", "type"=>"dropdown"), "radio" => array( "name" => "_meta_radio", "std" => 1, "title" => "单选框", "buttons" => array('Yes','No'), "type"=>"radio"), "checkbox" => array( "name" => "_meta_checkbox", "std" => 1, "title" => "复选框", "type"=>"checkbox"), ); function new_meta_boxes() { global $post, $new_meta_boxes; foreach($new_meta_boxes as $meta_box) { //获取保存的是 $meta_box_value = get_post_meta($post->ID, $meta_box['name'].'_value', true); if($meta_box_value != "") $meta_box['std'] = $meta_box_value;//将默认值替换为以保存的值 echo'<input type="hidden" name="'.$meta_box['name'].'_noncename" id="'.$meta_box['name'].'_noncename" value="'.wp_create_nonce( plugin_basename(__FILE__) ).'" />'; //通过选择类型输出不同的html代码 switch ( $meta_box['type'] ){ case 'title': echo'<h4>'.$meta_box['title'].'</h4>'; break; case 'text': echo'<h4>'.$meta_box['title'].'</h4>'; echo '<input type="text" size="40" name="'.$meta_box['name'].'_value" value="'.$meta_box['std'].'" /><br />'; break; case 'textarea': echo'<h4>'.$meta_box['title'].'</h4>'; echo '<textarea cols="60" rows="3" name="'.$meta_box['name'].'_value">'.$meta_box['std'].'</textarea><br />'; break; case 'dropdown': echo'<h4>'.$meta_box['title'].'</h4>'; if($meta_box['subtype'] == 'cat'){ $select = 'Select category'; $entries = get_categories('title_li=&orderby=name&hide_empty=0');//获取分类 } echo '<p><select name="'.$meta_box['name'].'_value"> '; echo '<option value="">'.$select .'</option> '; foreach ($entries as $key => $entry){ $id = $entry->term_id; $title = $entry->name; if ( $meta_box['std'] == $id ){ $selected = "selected='selected'"; }else{ $selected = ""; } echo "<option $selected value='". $id."'>". $title."</option>"; } echo '</select><br />'; break; case 'radio': echo'<h4>'.$meta_box['title'].'</h4>'; $counter = 1; foreach( $meta_box['buttons'] as $radiobutton ) { $checked =""; if(isset($meta_box['std']) && $meta_box['std'] == $counter) { $checked = 'checked = "checked"'; } echo '<input '.$checked.' type="radio" class="kcheck" value="'.$counter.'" name="'.$meta_box['name'].'_value"/>'.$radiobutton; $counter++; } break; case 'checkbox': echo'<h4>'.$meta_box['title'].'</h4>'; if( isset($meta_box['std']) && $meta_box['std'] == 'true' ) $checked = 'checked = "checked"'; else $checked = ''; echo '<input type="checkbox" name="'.$meta_box['name'].'_value" value="true" '.$checked.' />'; break; } } } function create_meta_box() { global $theme_name; if ( function_exists('add_meta_box') ) { add_meta_box( 'new-meta-boxes', '自定义模块', 'new_meta_boxes', 'post', 'normal', 'high' ); } } function save_postdata( $post_id ) { global $post, $new_meta_boxes; foreach($new_meta_boxes as $meta_box) { if ( !wp_verify_nonce( $_POST[$meta_box['name'].'_noncename'], plugin_basename(__FILE__) )) { return $post_id; } if ( 'page' == $_POST['post_type'] ) { if ( !current_user_can( 'edit_page', $post_id )) return $post_id; } else { if ( !current_user_can( 'edit_post', $post_id )) return $post_id; } $data = $_POST[$meta_box['name'].'_value']; if(get_post_meta($post_id, $meta_box['name'].'_value') == "") add_post_meta($post_id, $meta_box['name'].'_value', $data, true); elseif($data != get_post_meta($post_id, $meta_box['name'].'_value', true)) update_post_meta($post_id, $meta_box['name'].'_value', $data); elseif($data == "") delete_post_meta($post_id, $meta_box['name'].'_value', get_post_meta($post_id, $meta_box['name'].'_value', true)); } } add_action('admin_menu', 'create_meta_box'); add_action('save_post', 'save_postdata'); $ashu_eitor = get_post_meta($post->ID, "_meta_keywords_value", true);
三、创建面板
$new_meta_boxes = array( "title" => array( "name" => "_meta_title", "std" => "", "title" => "标题", "type"=>"title"), "keywords" => array( "name" => "_meta_keywords", "std" => "", "title" => "关键字", "type"=>"text"), "description" => array( "name" => "_meta_description", "std" => "", "title" => "描述", "type"=>"textarea"), "category" => array( "name" => "_meta_cate", "std" => "", "title" => "选择分类", "subtype"=> "cat", "type"=>"dropdown"), "radio" => array( "name" => "_meta_radio", "std" => 1, "title" => "单选框", "buttons" => array('Yes','No'), "type"=>"radio"), "checkbox" => array( "name" => "_meta_checkbox", "std" => 1, "title" => "复选框", "type"=>"checkbox"), ); function new_meta_boxes() { global $post, $new_meta_boxes; foreach($new_meta_boxes as $meta_box) { //获取保存的是 $meta_box_value = get_post_meta($post->ID, $meta_box['name'].'_value', true); if($meta_box_value != "") $meta_box['std'] = $meta_box_value;//将默认值替换为以保存的值 echo'<input type="hidden" name="'.$meta_box['name'].'_noncename" id="'.$meta_box['name'].'_noncename" value="'.wp_create_nonce( plugin_basename(__FILE__) ).'" />'; //通过选择类型输出不同的html代码 switch ( $meta_box['type'] ){ case 'title': echo'<h4>'.$meta_box['title'].'</h4>'; break; case 'text': echo'<h4>'.$meta_box['title'].'</h4>'; echo '<input type="text" size="40" name="'.$meta_box['name'].'_value" value="'.$meta_box['std'].'" /><br />'; break; case 'textarea': echo'<h4>'.$meta_box['title'].'</h4>'; echo '<textarea cols="60" rows="3" name="'.$meta_box['name'].'_value">'.$meta_box['std'].'</textarea><br />'; break; case 'dropdown': echo'<h4>'.$meta_box['title'].'</h4>'; if($meta_box['subtype'] == 'cat'){ $select = 'Select category'; $entries = get_categories('title_li=&orderby=name&hide_empty=0');//获取分类 } echo '<p><select name="'.$meta_box['name'].'_value"> '; echo '<option value="">'.$select .'</option> '; foreach ($entries as $key => $entry){ $id = $entry->term_id; $title = $entry->name; if ( $meta_box['std'] == $id ){ $selected = "selected='selected'"; }else{ $selected = ""; } echo "<option $selected value='". $id."'>". $title."</option>"; } echo '</select><br />'; break; case 'radio': echo'<h4>'.$meta_box['title'].'</h4>'; $counter = 1; foreach( $meta_box['buttons'] as $radiobutton ) { $checked =""; if(isset($meta_box['std']) && $meta_box['std'] == $counter) { $checked = 'checked = "checked"'; } echo '<input '.$checked.' type="radio" class="kcheck" value="'.$counter.'" name="'.$meta_box['name'].'_value"/>'.$radiobutton; $counter++; } break; case 'checkbox': echo'<h4>'.$meta_box['title'].'</h4>'; if( isset($meta_box['std']) && $meta_box['std'] == 'true' ) $checked = 'checked = "checked"'; else $checked = ''; echo '<input type="checkbox" name="'.$meta_box['name'].'_value" value="true" '.$checked.' />'; break; } } } function create_meta_box() { global $theme_name; if ( function_exists('add_meta_box') ) { add_meta_box( 'new-meta-boxes', '自定义模块', 'new_meta_boxes', 'post', 'normal', 'high' ); } } function save_postdata( $post_id ) { global $post, $new_meta_boxes; foreach($new_meta_boxes as $meta_box) { if ( !wp_verify_nonce( $_POST[$meta_box['name'].'_noncename'], plugin_basename(__FILE__) )) { return $post_id; } if ( 'page' == $_POST['post_type'] ) { if ( !current_user_can( 'edit_page', $post_id )) return $post_id; } else { if ( !current_user_can( 'edit_post', $post_id )) return $post_id; } $data = $_POST[$meta_box['name'].'_value']; if(get_post_meta($post_id, $meta_box['name'].'_value') == "") add_post_meta($post_id, $meta_box['name'].'_value', $data, true); elseif($data != get_post_meta($post_id, $meta_box['name'].'_value', true)) update_post_meta($post_id, $meta_box['name'].'_value', $data); elseif($data == "") delete_post_meta($post_id, $meta_box['name'].'_value', get_post_meta($post_id, $meta_box['name'].'_value', true)); } } add_action('admin_menu', 'create_meta_box'); add_action('save_post', 'save_postdata'); $ashu_eitor = get_post_meta($post->ID, "_meta_keywords_value", true);
四、保存更新数据
$new_meta_boxes = array( "title" => array( "name" => "_meta_title", "std" => "", "title" => "标题", "type"=>"title"), "keywords" => array( "name" => "_meta_keywords", "std" => "", "title" => "关键字", "type"=>"text"), "description" => array( "name" => "_meta_description", "std" => "", "title" => "描述", "type"=>"textarea"), "category" => array( "name" => "_meta_cate", "std" => "", "title" => "选择分类", "subtype"=> "cat", "type"=>"dropdown"), "radio" => array( "name" => "_meta_radio", "std" => 1, "title" => "单选框", "buttons" => array('Yes','No'), "type"=>"radio"), "checkbox" => array( "name" => "_meta_checkbox", "std" => 1, "title" => "复选框", "type"=>"checkbox"), ); function new_meta_boxes() { global $post, $new_meta_boxes; foreach($new_meta_boxes as $meta_box) { //获取保存的是 $meta_box_value = get_post_meta($post->ID, $meta_box['name'].'_value', true); if($meta_box_value != "") $meta_box['std'] = $meta_box_value;//将默认值替换为以保存的值 echo'<input type="hidden" name="'.$meta_box['name'].'_noncename" id="'.$meta_box['name'].'_noncename" value="'.wp_create_nonce( plugin_basename(__FILE__) ).'" />'; //通过选择类型输出不同的html代码 switch ( $meta_box['type'] ){ case 'title': echo'<h4>'.$meta_box['title'].'</h4>'; break; case 'text': echo'<h4>'.$meta_box['title'].'</h4>'; echo '<input type="text" size="40" name="'.$meta_box['name'].'_value" value="'.$meta_box['std'].'" /><br />'; break; case 'textarea': echo'<h4>'.$meta_box['title'].'</h4>'; echo '<textarea cols="60" rows="3" name="'.$meta_box['name'].'_value">'.$meta_box['std'].'</textarea><br />'; break; case 'dropdown': echo'<h4>'.$meta_box['title'].'</h4>'; if($meta_box['subtype'] == 'cat'){ $select = 'Select category'; $entries = get_categories('title_li=&orderby=name&hide_empty=0');//获取分类 } echo '<p><select name="'.$meta_box['name'].'_value"> '; echo '<option value="">'.$select .'</option> '; foreach ($entries as $key => $entry){ $id = $entry->term_id; $title = $entry->name; if ( $meta_box['std'] == $id ){ $selected = "selected='selected'"; }else{ $selected = ""; } echo "<option $selected value='". $id."'>". $title."</option>"; } echo '</select><br />'; break; case 'radio': echo'<h4>'.$meta_box['title'].'</h4>'; $counter = 1; foreach( $meta_box['buttons'] as $radiobutton ) { $checked =""; if(isset($meta_box['std']) && $meta_box['std'] == $counter) { $checked = 'checked = "checked"'; } echo '<input '.$checked.' type="radio" class="kcheck" value="'.$counter.'" name="'.$meta_box['name'].'_value"/>'.$radiobutton; $counter++; } break; case 'checkbox': echo'<h4>'.$meta_box['title'].'</h4>'; if( isset($meta_box['std']) && $meta_box['std'] == 'true' ) $checked = 'checked = "checked"'; else $checked = ''; echo '<input type="checkbox" name="'.$meta_box['name'].'_value" value="true" '.$checked.' />'; break; } } } function create_meta_box() { global $theme_name; if ( function_exists('add_meta_box') ) { add_meta_box( 'new-meta-boxes', '自定义模块', 'new_meta_boxes', 'post', 'normal', 'high' ); } } function save_postdata( $post_id ) { global $post, $new_meta_boxes; foreach($new_meta_boxes as $meta_box) { if ( !wp_verify_nonce( $_POST[$meta_box['name'].'_noncename'], plugin_basename(__FILE__) )) { return $post_id; } if ( 'page' == $_POST['post_type'] ) { if ( !current_user_can( 'edit_page', $post_id )) return $post_id; } else { if ( !current_user_can( 'edit_post', $post_id )) return $post_id; } $data = $_POST[$meta_box['name'].'_value']; if(get_post_meta($post_id, $meta_box['name'].'_value') == "") add_post_meta($post_id, $meta_box['name'].'_value', $data, true); elseif($data != get_post_meta($post_id, $meta_box['name'].'_value', true)) update_post_meta($post_id, $meta_box['name'].'_value', $data); elseif($data == "") delete_post_meta($post_id, $meta_box['name'].'_value', get_post_meta($post_id, $meta_box['name'].'_value', true)); } } add_action('admin_menu', 'create_meta_box'); add_action('save_post', 'save_postdata'); $ashu_eitor = get_post_meta($post->ID, "_meta_keywords_value", true);
五、触发函数
$new_meta_boxes = array( "title" => array( "name" => "_meta_title", "std" => "", "title" => "标题", "type"=>"title"), "keywords" => array( "name" => "_meta_keywords", "std" => "", "title" => "关键字", "type"=>"text"), "description" => array( "name" => "_meta_description", "std" => "", "title" => "描述", "type"=>"textarea"), "category" => array( "name" => "_meta_cate", "std" => "", "title" => "选择分类", "subtype"=> "cat", "type"=>"dropdown"), "radio" => array( "name" => "_meta_radio", "std" => 1, "title" => "单选框", "buttons" => array('Yes','No'), "type"=>"radio"), "checkbox" => array( "name" => "_meta_checkbox", "std" => 1, "title" => "复选框", "type"=>"checkbox"), ); function new_meta_boxes() { global $post, $new_meta_boxes; foreach($new_meta_boxes as $meta_box) { //获取保存的是 $meta_box_value = get_post_meta($post->ID, $meta_box['name'].'_value', true); if($meta_box_value != "") $meta_box['std'] = $meta_box_value;//将默认值替换为以保存的值 echo'<input type="hidden" name="'.$meta_box['name'].'_noncename" id="'.$meta_box['name'].'_noncename" value="'.wp_create_nonce( plugin_basename(__FILE__) ).'" />'; //通过选择类型输出不同的html代码 switch ( $meta_box['type'] ){ case 'title': echo'<h4>'.$meta_box['title'].'</h4>'; break; case 'text': echo'<h4>'.$meta_box['title'].'</h4>'; echo '<input type="text" size="40" name="'.$meta_box['name'].'_value" value="'.$meta_box['std'].'" /><br />'; break; case 'textarea': echo'<h4>'.$meta_box['title'].'</h4>'; echo '<textarea cols="60" rows="3" name="'.$meta_box['name'].'_value">'.$meta_box['std'].'</textarea><br />'; break; case 'dropdown': echo'<h4>'.$meta_box['title'].'</h4>'; if($meta_box['subtype'] == 'cat'){ $select = 'Select category'; $entries = get_categories('title_li=&orderby=name&hide_empty=0');//获取分类 } echo '<p><select name="'.$meta_box['name'].'_value"> '; echo '<option value="">'.$select .'</option> '; foreach ($entries as $key => $entry){ $id = $entry->term_id; $title = $entry->name; if ( $meta_box['std'] == $id ){ $selected = "selected='selected'"; }else{ $selected = ""; } echo "<option $selected value='". $id."'>". $title."</option>"; } echo '</select><br />'; break; case 'radio': echo'<h4>'.$meta_box['title'].'</h4>'; $counter = 1; foreach( $meta_box['buttons'] as $radiobutton ) { $checked =""; if(isset($meta_box['std']) && $meta_box['std'] == $counter) { $checked = 'checked = "checked"'; } echo '<input '.$checked.' type="radio" class="kcheck" value="'.$counter.'" name="'.$meta_box['name'].'_value"/>'.$radiobutton; $counter++; } break; case 'checkbox': echo'<h4>'.$meta_box['title'].'</h4>'; if( isset($meta_box['std']) && $meta_box['std'] == 'true' ) $checked = 'checked = "checked"'; else $checked = ''; echo '<input type="checkbox" name="'.$meta_box['name'].'_value" value="true" '.$checked.' />'; break; } } } function create_meta_box() { global $theme_name; if ( function_exists('add_meta_box') ) { add_meta_box( 'new-meta-boxes', '自定义模块', 'new_meta_boxes', 'post', 'normal', 'high' ); } } function save_postdata( $post_id ) { global $post, $new_meta_boxes; foreach($new_meta_boxes as $meta_box) { if ( !wp_verify_nonce( $_POST[$meta_box['name'].'_noncename'], plugin_basename(__FILE__) )) { return $post_id; } if ( 'page' == $_POST['post_type'] ) { if ( !current_user_can( 'edit_page', $post_id )) return $post_id; } else { if ( !current_user_can( 'edit_post', $post_id )) return $post_id; } $data = $_POST[$meta_box['name'].'_value']; if(get_post_meta($post_id, $meta_box['name'].'_value') == "") add_post_meta($post_id, $meta_box['name'].'_value', $data, true); elseif($data != get_post_meta($post_id, $meta_box['name'].'_value', true)) update_post_meta($post_id, $meta_box['name'].'_value', $data); elseif($data == "") delete_post_meta($post_id, $meta_box['name'].'_value', get_post_meta($post_id, $meta_box['name'].'_value', true)); } } add_action('admin_menu', 'create_meta_box'); add_action('save_post', 'save_postdata'); $ashu_eitor = get_post_meta($post->ID, "_meta_keywords_value", true);
效果：
调用的时候使用get_post_meta函数获取即可，不过主要我们保存的字段名称，虽然我们的配置数组中配置了name，但是保存自定义字段的时候我们在字段名称后面加了_value，以我们的关键字_meta_keywords为例，获取应该是：
$new_meta_boxes = array( "title" => array( "name" => "_meta_title", "std" => "", "title" => "标题", "type"=>"title"), "keywords" => array( "name" => "_meta_keywords", "std" => "", "title" => "关键字", "type"=>"text"), "description" => array( "name" => "_meta_description", "std" => "", "title" => "描述", "type"=>"textarea"), "category" => array( "name" => "_meta_cate", "std" => "", "title" => "选择分类", "subtype"=> "cat", "type"=>"dropdown"), "radio" => array( "name" => "_meta_radio", "std" => 1, "title" => "单选框", "buttons" => array('Yes','No'), "type"=>"radio"), "checkbox" => array( "name" => "_meta_checkbox", "std" => 1, "title" => "复选框", "type"=>"checkbox"), ); function new_meta_boxes() { global $post, $new_meta_boxes; foreach($new_meta_boxes as $meta_box) { //获取保存的是 $meta_box_value = get_post_meta($post->ID, $meta_box['name'].'_value', true); if($meta_box_value != "") $meta_box['std'] = $meta_box_value;//将默认值替换为以保存的值 echo'<input type="hidden" name="'.$meta_box['name'].'_noncename" id="'.$meta_box['name'].'_noncename" value="'.wp_create_nonce( plugin_basename(__FILE__) ).'" />'; //通过选择类型输出不同的html代码 switch ( $meta_box['type'] ){ case 'title': echo'<h4>'.$meta_box['title'].'</h4>'; break; case 'text': echo'<h4>'.$meta_box['title'].'</h4>'; echo '<input type="text" size="40" name="'.$meta_box['name'].'_value" value="'.$meta_box['std'].'" /><br />'; break; case 'textarea': echo'<h4>'.$meta_box['title'].'</h4>'; echo '<textarea cols="60" rows="3" name="'.$meta_box['name'].'_value">'.$meta_box['std'].'</textarea><br />'; break; case 'dropdown': echo'<h4>'.$meta_box['title'].'</h4>'; if($meta_box['subtype'] == 'cat'){ $select = 'Select category'; $entries = get_categories('title_li=&orderby=name&hide_empty=0');//获取分类 } echo '<p><select name="'.$meta_box['name'].'_value"> '; echo '<option value="">'.$select .'</option> '; foreach ($entries as $key => $entry){ $id = $entry->term_id; $title = $entry->name; if ( $meta_box['std'] == $id ){ $selected = "selected='selected'"; }else{ $selected = ""; } echo "<option $selected value='". $id."'>". $title."</option>"; } echo '</select><br />'; break; case 'radio': echo'<h4>'.$meta_box['title'].'</h4>'; $counter = 1; foreach( $meta_box['buttons'] as $radiobutton ) { $checked =""; if(isset($meta_box['std']) && $meta_box['std'] == $counter) { $checked = 'checked = "checked"'; } echo '<input '.$checked.' type="radio" class="kcheck" value="'.$counter.'" name="'.$meta_box['name'].'_value"/>'.$radiobutton; $counter++; } break; case 'checkbox': echo'<h4>'.$meta_box['title'].'</h4>'; if( isset($meta_box['std']) && $meta_box['std'] == 'true' ) $checked = 'checked = "checked"'; else $checked = ''; echo '<input type="checkbox" name="'.$meta_box['name'].'_value" value="true" '.$checked.' />'; break; } } } function create_meta_box() { global $theme_name; if ( function_exists('add_meta_box') ) { add_meta_box( 'new-meta-boxes', '自定义模块', 'new_meta_boxes', 'post', 'normal', 'high' ); } } function save_postdata( $post_id ) { global $post, $new_meta_boxes; foreach($new_meta_boxes as $meta_box) { if ( !wp_verify_nonce( $_POST[$meta_box['name'].'_noncename'], plugin_basename(__FILE__) )) { return $post_id; } if ( 'page' == $_POST['post_type'] ) { if ( !current_user_can( 'edit_page', $post_id )) return $post_id; } else { if ( !current_user_can( 'edit_post', $post_id )) return $post_id; } $data = $_POST[$meta_box['name'].'_value']; if(get_post_meta($post_id, $meta_box['name'].'_value') == "") add_post_meta($post_id, $meta_box['name'].'_value', $data, true); elseif($data != get_post_meta($post_id, $meta_box['name'].'_value', true)) update_post_meta($post_id, $meta_box['name'].'_value', $data); elseif($data == "") delete_post_meta($post_id, $meta_box['name'].'_value', get_post_meta($post_id, $meta_box['name'].'_value', true)); } } add_action('admin_menu', 'create_meta_box'); add_action('save_post', 'save_postdata'); $ashu_eitor = get_post_meta($post->ID, "_meta_keywords_value", true);
其实本教程的代码很多和前面的相同，只不过给准备的数据加了个类型判断，通过判断类型来输出不同的html代码。。