你快到了。
难题的最后一部分是保存元数据的函数,但首先我们需要对现有代码进行一些调整:
add_action( 'save_post', 'cd_meta_box_add', 10, 2 ); 必须移出cd_meta_box_add(),并且
将add_action( 'save_post', 'cd_meta_box_add', 10, 2 ); 更改为add_action( 'save_post', 'cd_meta_box_add' );,因为此操作挂钩仅接收一个参数(帖子ID),并且
-
您需要定义将处理数据的函数(它不能像您现在拥有的那样是 cd_meta_box_add,因此我们将创建一个名为 save_cd_meta_box_data 的新函数。
/* Save post meta on the 'save_post' hook. */
add_action( 'save_post', 'save_cd_meta_box_data' );
function save_cd_meta_box_data( $post_id ) {
// Autosaving, bail.
if ( defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE ) {
return;
}
// @TODO
// You should add some additional security checks here
// eg. nonce, user capabilities, etc, to prevent
// malicious users from doing bad stuff.
/* OK, it's safe for us to save the data now. */
// Make sure that it is set.
if ( ! isset( $_POST['jobtitle'] ) ) {
return;
}
// Sanitize user input.
$my_data = sanitize_text_field( $_POST['jobtitle'] );
// Update the meta field in the database.
update_post_meta( $post_id, '_job_title', $my_data );
}
- 现在我们已成功将元数据保存到数据库中,让我们允许用户查看/编辑它:
function cd_meta_box_cb( $post )
{
$job_title = get_post_meta( $post->ID, '_job_title', true );
echo "<input type='text' name='jobtitle' value='" . esc_attr( $job_title ) . "'>";
}
最终代码应如下所示:
/* Register and display metabox */
add_action( 'add_meta_boxes', 'cd_meta_box_add' );
function cd_meta_box_add()
{
add_meta_box( 'my-meta-box-id', 'Job Title', 'cd_meta_box_cb', 'people', 'normal', 'high' );
}
function cd_meta_box_cb( $post )
{
$job_title = get_post_meta( $post->ID, '_job_title', true );
echo "<input type='text' name='jobtitle' value='" . esc_attr( $job_title ) . "'>";
}
/* Save post meta on the 'save_post' hook. */
add_action( 'save_post', 'save_cd_meta_box_data' );
function save_cd_meta_box_data( $post_id ) {
// Autosaving, bail.
if ( defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE ) {
return;
}
// @TODO
// You should add some additional security checks here
// eg. nonce, user capabilities, etc, to prevent
// malicious users from doing bad stuff.
/* OK, it's safe for us to save the data now. */
// Make sure that it is set.
if ( ! isset( $_POST['jobtitle'] ) ) {
return;
}
// Sanitize user input.
$my_data = sanitize_text_field( $_POST['jobtitle'] );
// Update the meta field in the database.
update_post_meta( $post_id, '_job_title', $my_data );
}