Wordpress元框保存不为'；行不通

我无法理解为什么事件开始日期为时事件价格和事件位置不保存。我已经从各个方面对此进行了测试，但它仍然没有保存数据

  function event_detail_box_content() {
    global $post;

    $custom = get_post_custom($post->ID);
    $meta_sd = $custom["events_startdate"][0];
    $meta_pr = isset( $custom['events_price'] ) ? esc_attr( $custom["events_price"][0]): ”;
    $meta_lo = $custom["events_location"][0];

    $meta_st = $meta_sd;

    $time_format = get_option('time_format');

    if ($meta_sd == null) { $meta_sd = time(); $meta_st = 0;}

    $clean_sd = date("D, M d, Y", $meta_sd);
    $clean_st = date($time_format, $meta_st);

    wp_nonce_field( 'my_meta_box_nonce', 'meta_box_nonce' ); 

    ?>
    <div class="tf-meta">
    <ul>
        <li><label>Event Date</label><input name="events_startdate" class="tfdate" value="<?php echo $clean_sd; ?>" /></li>
        <li><label>Event Time</label><input name="events_starttime" value="<?php echo $clean_st; ?>" /><em>Use 24h format (7pm = 19:00)</em></li>
        <li><label>Event Price</label><input name="events_price" value="<?php echo $meta_pr; ?>" /></li>
        <li><label>Event Location</label><input name="events_location" value="<?php echo $meta_lo; ?>" /></li>
    </ul>
    </div>
    <?php
    print_r($custom);
 }

  add_action ('save_post', 'save_events');

 function save_events($post_id){

    if ( !wp_verify_nonce( $_POST['meta_box_nonce'], 'my_meta_box_nonce' ) ) return; 

    if ( !current_user_can( 'edit_post')) return;

    if(!isset($_POST["events_startdate"])): return; endif;

    $updatestartd = strtotime ( $_POST["events_startdate"] . $_POST["events_starttime"] );

    update_post_meta($post_id, "events_startdate", $updatestartd ); 

    update_post_meta($post_id, "events_price",  $POST["events_price"] );  

    update_post_meta($post_id, "events_location", $POST["events_location"] ); 
 }

功能事件\u详细信息\u框\u内容（）{
全球$员额；
$custom=get\u post\u custom（$post->ID）；
$meta_sd=$custom[“事件开始日期”][0]；
$meta_pr=isset（$custom['events_price']）？esc_attr（$custom[“events_price”][0]）：“；
$meta_lo=$custom[“事件位置”][0]；
$meta_st=$meta_sd；
$time\u format=get\u选项（“time\u format”）；
如果（$meta_sd==null）{$meta_sd=time（）；$meta_st=0；}
$clean_sd=日期（“D，md，Y”，$meta_sd）；
$clean\u st=日期（$time\u格式，$meta\u st）；
wp_nonce_字段（'my_meta_box_nonce'，'meta_box_nonce'）；
?>

事件日期您的
$\u POST
变量上缺少下划线

update_post_meta($post_id, "events_price",  $POST["events_price"] );  

update_post_meta($post_id, "events_location", $POST["events_location"] );

应该是

update_post_meta($post_id, "events_price",  $_POST["events_price"] );  

update_post_meta($post_id, "events_location", $_POST["events_location"] );

$\u POST
变量上缺少下划线

update_post_meta($post_id, "events_price",  $POST["events_price"] );  

update_post_meta($post_id, "events_location", $POST["events_location"] );

应该是

update_post_meta($post_id, "events_price",  $_POST["events_price"] );  

update_post_meta($post_id, "events_location", $_POST["events_location"] );