post metabox 範例程式1

Screen Shot 2016-02-16 at 3.39.02 PM

 /* Called by save_post action to save meta data in database. */
    function save_my_custom_meta_box($post_id,  $post, $update)/*$post contains info about the post and $post_id is assigned to the id of the post*/
        /* Verify the nonce before proceeding. For security */
        if (!isset($_POST["qnimate-email-nonce"]) || !wp_verify_nonce($_POST["qnimate-email-nonce"], basename(__FILE__)))
          return $post_id;
        /* Check if the current user has permission to edit the post. For security */
        if(!current_user_can("edit_post", $post_id))
            return $post_id;

        //check if it is autosave
        if(defined("DOING_AUTOSAVE") && DOING_AUTOSAVE)
            return $post_id;

        //check if the post type is correct
        $slug = "post";
        if($slug != $post->post_type)

        /* Store the user enter value in a variable */
        $user_entered_email_value = "";
            $user_entered_email_value = $_POST["author-email"];
            $user_entered_email_value = "";
        update_post_meta($post_id, "author-email", $user_entered_email_value);

    function meta_box_markup($object)/*$object conatins the information about the post*/
        /*nonce for security purpose. more on it at */
        wp_nonce_field(basename(__FILE__), 'qnimate-email-nonce');

            <!-- Markup inside the custom meta box -->
                <label for="author-email">E-Mail Of Author</label>
                <!-- Retrieve the email from database. If not yet set then empty string is returned. -->
                <input name="author-email" type="email" validate="true" value="<?php echo get_post_meta($object->ID, "author-email", true); ?>">

    function my_custom_meta_box()
        Parameters for add_meta_box() are $id, $title, $callback, $page, $context, $priority, $callback_args
        -> $id is a unqiue id given to every meta box
        -> $title is the title displayed in custom meta box
        -> $callback is a function that outputs markup inside the custom meta box
        -> $page respresents the admin page on which the mata box will be displayed on. It can be page, post, custom post type 
        -> $context respresents the postiton of the meta box. It can be normal, advanced or side.
        -> $priority is the position of the box insde the context. It can be high, core, default or low
        -> $cannback_args is used to pass arguements to the callback function.
        add_meta_box("qnimate-meta-box", "Author Information", "meta_box_markup", "post", "normal", "default", null);

    /* This action is responsibe for creating and displaying meta boxes */
    add_action("add_meta_boxes",  "my_custom_meta_box");

    /* Used to store the meta data in database */
    add_action("save_post", "save_my_custom_meta_box" , 10, 3);
CH02用戶資料CH03基本APICH05 分類頁面Category.phpCH09Screen Options(顯示選項)CH10外掛pluginsCH11 add_actionCH12 add_filterCH13Meta Box(自訂區塊)CH14widget(自訂模組)CH15 DBCH16AJAXCH17ShortcodeCH20 wordpress muCH30WooCommerce