Bạn có thể tạo hộp meta của riêng mình bằng hộp kiểm và chỉ chọn các bài đăng được chọn:
Thêm mã metabox
/* Define the custom box */
add_action( 'add_meta_boxes', 'my_slider_add_custom_box' );
/* Do something with the data entered */
add_action( 'save_post', 'my_slider_save_postdata' );
/* Adds a box to the main column on the Post and Page edit screens */
function my_slider_add_custom_box() {
add_meta_box(
'my_slider_sectionid',
__( 'my slider', 'my_slider_textdomain' ),
'my_slider_inner_custom_box',
'post'
);
}
/* Prints the box content */
function my_slider_inner_custom_box() {
global $post;
// Use nonce for verification
wp_nonce_field( plugin_basename( __FILE__ ), 'my_slider_noncename' );
$saved = get_post_meta($post->ID,'my_slider_field',true);
// The actual fields for data entry
echo '<label for="my_slider_field">';
_e("Check the box if you want this post to show in the slider", 'myplugin_textdomain' );
echo '</label> ';
echo '<input type="checkbox" id="my_slider_field" name="my_slider_field" value="yes"';
echo ($saved) ? 'checked': '';
echo '/>';
}
/* When the post is saved, saves our custom data */
function my_slider_save_postdata( $post_id ) {
// verify if this is an auto save routine.
// If it is our form has not been submitted, so we dont want to do anything
if ( defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE )
return;
// verify this came from the our screen and with proper authorization,
// because save_post can be triggered at other times
if ( !wp_verify_nonce( $_POST['my_slider_noncename'], plugin_basename( __FILE__ ) ) )
return;
// OK, we're authenticated: we need to find and save the data
$old = get_post_meta($post_id,'my_slider_field',true);
if (isset($_POST['my_slider_field']) && $_POST['my_slider_field'] == "yes"){
update_post_meta($post_id,'my_slider_field',true);
}else{
if (!empty($old)){
delete_post_meta($post_id,'my_slider_field');
}
}
}
Truy vấn bài viết đã được kiểm tra
$args = array(
'posts_per_page' => -1
'meta_query' => array(
array(
'key' => 'my_slider_field',
'value' => true
)
);
$slider_query = new WP_Query($args);