通过自定义字段重新排序 WordPress 文章方法

add_action('post_submitbox_misc_actions', 'add_publish_meta_custom_field');
function add_publish_meta_custom_field($post_obj) {
 
  	global $post;
  	$post_type = 'post';
  	$value = get_post_meta($post_obj->ID, 'post_order', true); 
  	$val = ($value) ? $value : "0";
  	if($post_type==$post->post_type) {

	    echo '<div class="misc-pub-section misc-pub-section-last">'
	         .'<label>Post Order <input name="post_order" type="number" step="1" min="0" id="post_order" value="'.$val.'" class="small-text"></label>'
	         .'</div>';
  	}
}

add_action( 'save_post', 'save_publish_meta_custom_field', 10 , 3);
function save_publish_meta_custom_field($post_id, $post, $update) {
 
  	$post_type = 'post';
  	if ( $post_type != $post->post_type ) {
    	return;
  	}
 
  	if ( wp_is_post_revision( $post_id ) ) {
    	return;
  	}

  	if(isset($_POST['post_order'])) {
    	update_post_meta($post_id, 'post_order', $_POST['post_order']);
  	}

}

function pre_custom_post_order_sort( $query ){
  if ( is_home() && $query->is_main_query() ){
    $query->set( 'orderby', 'meta_value' );
    $query->set( 'meta_key', 'post_order' );
    $query->set( 'order' , 'ASC' );
  }
}
add_action( 'pre_get_posts' , 'pre_custom_post_order_sort' );

$args = array(
    'post_type' => 'post',
    'meta_key' => 'post_order',
    'orderby' => 'meta_value',
    'order' => 'ASC'
);

$query = new WP_query ( $args );

if ( $query->have_posts() ) {
    while ($query->have_posts() ) {
        $query->the_post();

        if ( !empty(get_post_meta( $post->ID, 'post_order', true )) ) {
            the_title();
        }

    wp_reset_postdata();
}