Ticket #53644: test-wpeditor-metabox.php

<?php
/**
 * Add and render Metabox for post
 */

add_action( 'add_meta_boxes', 'wpdev_add_post_metabox' );

function wpdev_add_post_metabox() {
        // Add new meta box.
        add_meta_box(
                'wpdev_post_metabox',
                'Test WPeditor',
                'wpdev_render_post_metabox',
                'post',
                'normal'
        );
}

function wpdev_render_post_metabox() {
        global $post;

        // Get saved meta data.
        $post_note_meta_content = get_post_meta( $post->ID, 'wpdev_post_field_tinymce', true );

        // Nonce field.
        wp_nonce_field( 'wpdev_post_metabox_nonce_' . $post->ID, 'wpdev_post_metabox_nonce' );

        // Render editor metabox.
        wp_editor(
                $post_note_meta_content,
                'wpdev_post_field_tinymce',
                array( 'textarea_rows' => '5' )
        );
}

/**
 * Save post metabox
 */

add_action( 'save_post', 'wpdev_save_post' );

function wpdev_save_post( $post_id ) {

        // Bail if auto save.
        if ( defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE ) {
                return;
        }

        // Bail if nonce is missing or nonce verification fails.
        if ( ! isset( $_POST['wpdev_post_metabox_nonce'] ) || ! wp_verify_nonce( $_POST['wpdev_post_metabox_nonce'], 'wpdev_post_metabox_nonce_' . $post_id ) ) {
                return;
        }

        // Bail is current user is allowed to edit posts.
        if ( ! current_user_can( 'edit_post' ) ) {
                return;
        }

        // Make sure our data is set before trying to save it.
        if ( isset( $_POST['wpdev_post_field_tinymce'] ) ) {
                update_post_meta( $post_id, 'wpdev_post_field_tinymce', $_POST['wpdev_post_field_tinymce'] );
        }
}