我简化了在更新时保存自定义元数据库的问题，但仍然无法获取将自定义字段输入保存到数据库的框。

这是来自functions.php 到外部文件/metaboxes/home-meta-new.php:

    // Loading Home Page Meta Box Code from External .php file
    add_action( \'add_meta_boxes_page\',\'load_home_meta\' );
    function load_home_meta() {
        $post_id = $_GET[\'post\'] ? $_GET[\'post\'] : $_POST[\'post_ID\'];
        if($post_id == \'104\'){
            include( get_template_directory() . \'/metaboxes/home-meta-new.php\' );
        }
    }

不幸的是，一旦为自定义字段输入了值并且用户单击了更新，post就会刷新而不保存值。这是home-meta-new.php 代码：

    <?php

    /**
     * Home Page Custom Meta Content
     *
    **/

add_meta_box(  
    \'home_meta_box\', // $id  
    \'Home Page Content\', // $title   
    \'show_home_meta_box\', // $callback  
    \'page\', // $page  
    \'normal\', // $context  
    \'high\'); // $priority       

    // Creating Array for Fields
    $prefix = \'_home_\';
    global $home_meta_fields;
    $home_meta_fields = array(
        array(
            \'label\' => \'Caption Title\',
            \'desc\' => \'Upper section H2 caption title.\',
            \'id\' => $prefix.\'title\',
            \'type\' => \'text\'
        ),
        array(
            \'label\' => \'Caption Sub Title\',
            \'desc\' => \'Upper section H3 caption title.\',
            \'id\' => $prefix.\'sub_title\',
            \'type\' => \'text\'
        ),
      array(  
          \'label\'=> \'Caption\',  
          \'desc\'  => \'Caption text block.\',  
          \'id\'    => $prefix.\'caption\',  
          \'type\'  => \'textarea\'  
      ),
        array(  
            \'label\'  => \'Caption Image\',  
            \'desc\'  => \'Upload a pre-cropped 1140px wide x 530px tall web-optimized image.\',  
            \'id\'    => $prefix.\'image\',  
            \'type\'  => \'image\'  
        )
    );// end home_meta array

    //The Callback
    function show_home_meta_box() {
    global $home_meta_fields, $post;
    // Using nonce for verification
    echo \'<input type="hidden" name="home_meta_box_nonce" value="\'.wp_create_nonce(\'home_upper_nonce\').\'" />\';
    //wp_nonce_field( \'home_upper_nonce\', \'home_upper_nonce\' );

        //Begin field table and loop
        echo \'<table class="form-table">\';
        foreach ($home_meta_fields as $field) {
            // get value of this field if it exists for this page
            $meta = get_post_meta($post->ID, $field[\'id\'], true);
            // begin a table row with
            echo \'<tr>
                            <th><label for="\'.$field[\'id\'].\'">\'.$field[\'label\'].\'</label></th>
                            <td>\';
                            switch($field[\'type\']) {
                                // case items will go here
                                // text  
                                case \'text\':  
                                    echo \'<input type="text" name="\'.$field[\'id\'].\'" id="\'.$field[\'id\'].\'" value="\'.$meta.\'" size="30" /> 
                                        <br /><span class="description">\'.$field[\'desc\'].\'</span>\';  
                                break;
                                // textarea  
                                case \'textarea\':  
                                    echo \'<textarea name="\'.$field[\'id\'].\'" id="\'.$field[\'id\'].\'" cols="60" rows="4">\'.$meta.\'</textarea> 
                                        <br /><span class="description">\'.$field[\'desc\'].\'</span>\';  
                                break;
                                case \'image\':  
                                    $image = get_template_directory_uri().\'/library/images/img-preview-blank.png\';    
                                    echo \'<span class="custom_default_image" style="display:none">\'.$image.\'</span>\';  
                                    if ($meta) { $image = wp_get_attachment_image_src($meta, \'medium\'); $image = $image[0]; }                 
                                    echo    \'<input name="\'.$field[\'id\'].\'" type="hidden" class="custom_upload_image" value="\'.$meta.\'" /> 
                                                <img src="\'.$image.\'" class="custom_preview_image" style="max-width:300px" alt="" /><br /> 
                                                    <input class="custom_upload_image_button button" type="button" value="Choose Image" /> 
                                                    <small> <a href="#" class="custom_clear_image_button">Remove Image</a></small> 
                                                    <br clear="all" /><span class="description">\'.$field[\'desc\'].\'\';  
                                break;  
                            } // end switch
            echo \'</td></tr>\';
        } // end foreach
        echo \'</table>\'; // end table
    }// end build metabox callback

    // Save the Data
    function save_home_meta($post_id) {  
        global $home_meta_fields;  

        // verify nonce 

        //option one 
        //if (!wp_verify_nonce($_POST[\'home_meta_box_nonce\'], basename(__FILE__)))   
            //return $post_id;  

            //option two
            if (isset($_POST[\'home_meta_box_nonce\'])){
                if ( !wp_verify_nonce( $_POST[\'home_meta_box_nonce\'], \'home_upper_nonce\' ) )
                    return;
            }else{return;}

        // check autosave  
        if (defined(\'DOING_AUTOSAVE\') && DOING_AUTOSAVE)  
            return $post_id;  
        // check permissions  
        if (\'page\' == $_POST[\'post_type\']) {  
            if (!current_user_can(\'edit_page\', $post_id))  
                return $post_id;  
            } elseif (!current_user_can(\'edit_post\', $post_id)) {  
                return $post_id;  
        }  

        // loop through fields and save the data  
        foreach ($home_meta_fields as $field) {  
            $old = get_post_meta($post_id, $field[\'id\'], true);  
            $new = $_POST[$field[\'id\']];  
            //if ($new && $new != $old) {  
                    if ($new && ($new != $old)) {
                update_post_meta($post_id, $field[\'id\'], $new);  
            } elseif (\'\' == $new && $old) {  
                delete_post_meta($post_id, $field[\'id\'], $old);  
            }  
        } // end foreach  
    }  
    add_action(\'save_post\', \'save_home_meta\');
    // end save_home_meta

    ?>