Wordpress post_submit_box_misc_actions no data

Question

function sticker_render_post_button() { 
//post form to post_submit_box_misc_actions 
    global $post; 

      echo '<br><label for="pr_disc">Discount Sticker</label><input name="pr_disc" type="text" value="'.get_post_meta($post->ID, "_whole_discount",true).'" id="pr_disc" />'; 

} 
//add input 
add_action('post_submitbox_misc_actions', 'sticker_post_submitbox_start_action'); 

$ _REQUEST ['pr_disc']爲空。爲什麼？我試圖插入一個輸入，它會更新/添加元數據在其後。

剛剛澄清，這裏是另一部分：

function update_sticker_meta() { 
global $post; 

$wholedisc=$_REQUEST['pr_disc']; 
if (!update_post_meta($post->ID, '_whole_discount', $wholedisc)) {add_post_meta($post- >ID, '_whole_discount',$wholedisc,true);} 
return print($wholedisc); 

} 

add_action('publish_post', 'update_sticker_meta'); 

Answer 1

我不得不用得到它的工作

add_action('save_post', 'update_sticker_meta');