关于wordpress的自定义字段功能是我们建站中一个非常重要的知识,所以学习wordpress自定义字段是必须的,那么下面教大家wordpress代码快速创建自定义字段。只需要将如下代码添加至function.php即可,简单快捷!
调用方法:
<?php echo mo_get_post_from(); ?>
/* * post meta from 添加文章来源自定义字段 * ==================================================== */ // 创建字段信息 $postmeta_from = array( array( "name" => "fromname", "std" => "", "title" => __('来源名', 'orui').':' ), array( "name" => "fromurl", "std" => "", "title" => __('来源网址', 'orui').':' ) ); // 函数连接到指定action(动作) add_action('admin_menu', '_postmeta_from_create'); add_action('save_post', '_postmeta_from_save'); //创建自定义字段输入框 function _postmeta_from() { global $post, $postmeta_from; foreach($postmeta_from as $meta_box) { $meta_box_value = get_post_meta($post->ID, $meta_box['name'].'_value', true); if($meta_box_value == "") $meta_box_value = $meta_box['std']; echo'<p>'.$meta_box['title'].'</p>'; echo '<p><input type="text" value="'.$meta_box_value.'" name="'.$meta_box['name'].'_value"></p>'; } echo '<input type="hidden" name="post_newmetaboxes_noncename" id="post_newmetaboxes_noncename" value="'.wp_create_nonce( plugin_basename(__FILE__) ).'" />'; } //创建自定义字段模块 function _postmeta_from_create() { global $theme_name; if ( function_exists('add_meta_box') ) { add_meta_box( 'new-meta-boxes', __('来源', 'haoui'), '_postmeta_from', 'post', 'normal', 'high' ); } } // 保存数据 function _postmeta_from_save( $post_id ) { global $postmeta_from; if ( !wp_verify_nonce( $_POST['post_newmetaboxes_noncename'], plugin_basename(__FILE__) )) return; if ( !current_user_can( 'edit_posts', $post_id )) return; foreach($postmeta_from as $meta_box) { $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, $meta_box['name'].'_value', true)); } } // 调用函数 function mo_get_post_from($pid='', $prevtext='来源:'){ if( !$pid ){ $pid = get_the_ID(); } $fromname = trim(get_post_meta($pid, "fromname_value", true)); $fromurl = trim(get_post_meta($pid, "fromurl_value", true)); $from = ''; if( $fromname ){ if( $fromurl ){ $from = '<a href="'.$fromurl.'" target="_blank" rel="external nofollow">'.$fromname.'</a>'; }else{ $from = $fromname; } $from = ($prevtext).$from; } return $from; }