How to make WordPress background articles and pages display corresponding IDs?

As the title says, today WordPress Tutorial to solve a common problem. What if I get the ID of the article or page?
stay WordPress Each category, article, and page has a unique ID. When using or developing themes, it may be necessary to obtain corresponding articles or Page ID 。 For example, when presenting slides of featured articles, you need to obtain the ID of the corresponding article, etc.

Now I will teach you a way to quickly display the corresponding ID in the background article and page list.

As shown in the figure——

Add the following code to the functions.php file of the topic.

PS: The new version of the traveler theme already has this function, so it is unnecessary to add it. Please pay users to download the new experience.

 /*Display in article list and page list Article ID */
 function  suxingme_post_id_column (  $post_columns  )  {
 $beginning  =  array_slice (  $post_columns ,  zero  , one  ) ;
 $beginning [  'postid'  ]  =  __ (  'ID' ,  'suxingme'  ) ;
 $ending  =  array_slice (  $post_columns ,  one  ) ;
 $post_columns  =  array_merge (  $beginning ,  $ending  ) ;
 return  $post_columns ;
 }
 add_filter (  'manage_posts_columns' ,  'suxingme_post_id_column'  ) ; //Add Article List Page ID Title
 add_filter (  'manage_pages_columns' ,  'suxingme_post_id_column'  ) ; //Add Page List Page

 function  suxingme_posts_id_column (  $col ,  $val  )  {
 if (  $col  ==  'postid'  )  echo  $val ;
 }
 add_action (  'manage_posts_custom_column' ,  'suxingme_posts_id_column' ,  ten ,  two  ) ; //Add article list page ID column value
 add_action (  'manage_pages_custom_column' ,  'suxingme_posts_id_column' ,  ten ,  two  ) ; //Add Page List Page ID

 function  suxingme_posts_id_column_css ( )  {
 echo  '<style type="text/css">#postid { width: 50px; }</style>' ; //ID column width
 }
 add_action (  'admin_head-edit.php' ,  'suxingme_posts_id_column_css'  ) ;