WordPress社交分享插件POST变量未生效，测试代码无响应排查

我开发了一款用于实现内容便捷分享至社交媒体的WordPress插件模板，测试时发现POST变量的值未被正确设置，添加的测试代码既不执行也没有任何错误提示。我尝试在socialShareOnPostPublish函数中使用update_post_meta将POST数据保存到$post_id，但问题仍然存在。

原始代码 #

//Add box to the post edit page with share options
function socialsharePostOptions() {
    global $post;
    $FBtext = get_post_meta( $post->ID, 'FBtext', true );
    $FBshare = get_post_meta( $post->ID, 'FBshare', true );
    
    $TWtext = get_post_meta( $post->ID, 'TWtext', true );
    $TWshare = get_post_meta( $post->ID, 'TWshare', true );
    ?>
    <div>
        <label for="FB">FB post:</label>
        <input type="text" id="FBtext" name="FBtext" value="<?php echo esc_attr( $FBtext ); ?>">
        <input type="checkbox" id="FBshare" name="FBshare" <?php echo $FBshare === 'on' ? 'checked' : ''; ?>>
    </div>
    
    <div>
        <label for="TW">TW post:</label>
        <input type="text" id="TWtext" name="TWtext" value="<?php echo esc_attr( $TWtext ); ?>">
        <input type="checkbox" id="TWshare" name="TWshare" <?php echo $TWshare === 'on' ? 'checked' : ''; ?>>
    </div>
    
    <?php
}
// Add the shares to the post editor
function socialshare_field_add() {
  add_meta_box( 'socialshare_field', 'SocialShare', 'socialsharePostOptions', 'post', 'side', 'default' );
}
add_action('add_meta_boxes', 'socialshare_field_add');


//Run the script on post publish
function socialShareOnPostPublish($post_id){
    //TESTING - this doesn't give any error message (no 'die') !!! ???
    if(isset( $_POST['FBtext'] )){
        wp_die( $_POST['FBtext'] . " and " . $_POST['FBshare']);
    }    
    
 
    // Get the checkbox values
    $FBshare = isset( $_POST['FBshare'] ) ? 'on' : '';
    $TWshare = isset( $_POST['TWshare'] ) ? 'on' : '';
    
    
    
    // If the checkbox is not checked, don't run the script
    if ( $FBshare === 'on' ) {
        $FBtext = isset( $_POST['FBtext'] ) ? $_POST['FBtext'] : '';
        wp_die( $FBtext );
    }
    
    // If the checkbox is not checked, don't run the script
    if ( $TWshare === 'on' ) {
        $TWtext = isset( $_POST['TWtext'] ) ? $_POST['TWtext'] : '';
        wp_die( $TWtext );
    }
}


//add_action( 'publish_post', 'socialShareOnPostPublish' );
add_action( 'save_post', 'socialShareOnPostPublish' ); // TESTING SO ON SAVE

编辑后代码 #

function socialShareOnPostPublish($post_id){
    
    // Get the checkbox values
    $FBshare = isset( $_POST['FBshare'] ) ? 'on' : '';
    $TWshare = isset( $_POST['TWshare'] ) ? 'on' : '';
    
    // Save FBtext and FBshare to post meta
    if ( $FBshare === 'on' ) {
        $FBtext = isset( $_POST['FBtext'] ) ? $_POST['FBtext'] : '';
        update_post_meta( $post_id, 'FBtext', $FBtext );
        update_post_meta( $post_id, 'FBshare', $FBshare );
    }
    
    // Save TWtext and TWshare to post meta
    if ( $TWshare === 'on' ) {
        $TWtext = isset( $_POST['TWtext'] ) ? $_POST['TWtext'] : '';
        update_post_meta( $post_id, 'TWtext', $TWtext );
        update_post_meta( $post_id, 'TWshare', $TWshare );
    }
    
    if(isset( $_POST['FBtext'] )){
        wp_die( $_POST['FBtext'] . " and " . $_POST['FBshare']);
    }  
}

内容的提问来源于stack exchange，提问作者user1505631