我一直在努力将数据存储并显示在CPT字段上。我的代码如下：

function fhaac_subject_box_callback( $post ){
     wp_nonce_field( basename(__FILE__ ), \'fhacc_subject_nounce\');
     $fhaac_stored_subject_meta = get_post_meta( \'$post->ID\' );
?>

<div>Subject name: <input type="text" name="fhaac_subject_name" id="fhaac_
subject_name" value="<?php if ( ! empty ( $fhaac_stored_subject_meta 
[\'fhaac_subject_name\']) ) echo esc_attr ( $fhaac_stored_subject_meta 
[\'fhaac_subject_name\'][0] ); ?>"/></div>

我已设置save_post 转换为以下函数：

function fhaac_save_subject_meta( $post_id ){
//Checking save status
$is_autosave = wp_is_post_autosave( $post_id );
$is_revision = wp_is_post_revision( $post_id );
$is_valid_nonce = ( isset( $_POST[ \'fhacc_subject_nounce\' ] ) && 
wp_verify_nonce( $_POST[ \'fhacc_subject_nounce\' ], basename(__FILE__ 
)))?\'true\' : \'false\';

//Exit scripts depending on save status
if ( $is_autosave || $is_revision || !$is_valid_nonce){
    return;
}
if ( isset( $_POST[\'fhaac_subject_name\'])){
    update_post_meta( $post_id, \'fhaac_subject_name\', 
    sanitize_text_field($_POST[\'fhaac_subject_name\']));
}

但要么数据没有保存，要么正在返回。问题是，我在一个wp_editor 领域我对这方面还比较陌生，所以非常感谢您的帮助。

提前感谢！

function fhaac_subject_box_callback( $post ){
 wp_nonce_field( basename(__FILE__ ), \'fhacc_subject_nounce\');
 $fhaac_stored_subject_meta = get_post_meta( \'$post->ID\' );
 $fhaac_subject_name = get_post_meta($post->ID, \'my_data_subjectName\', true);
?>

<div>Subject name: <input type="text" name="fhaac_subject_name" id="fhaac_
subject_name" value="<?= $fhaac_subject_name; ?>"/></div>