我从Wordpress中获取了示例代码user_has_cap filter codex page 并对其进行了修改。将此代码添加到主题函数中。php：

function restrict_editing_old_posts( $allcaps, $cap, $args ) {

// Bail out if we\'re not asking to edit or delete a post ...
if( ( \'edit_post\' != $args[0] && \'delete_post\' != $args[0] )
  // ... or user is admin 
  || ! empty( $allcaps[\'manage_options\'] )
  // ... or user already cannot edit the post
  || empty( $allcaps[\'edit_posts\'] ) )
    return $allcaps;

// Load the post data:
$post = get_post( $args[2] );

// Bail out if the post isn\'t published:
if( \'publish\' != $post->post_status )
    return $allcaps;

$post_date = strtotime( $post->post_date );
//if post is older than 30 days ...
if( $post_date < strtotime( \'-30 days\' )
  // ... or if older than 4 days and user is not Editor
  || ( empty($allcaps[\'moderate_comments\']) && $post_date < strtotime(\'-4 days\') ) ) {
    $allcaps[$cap[0]] = FALSE;
}
return $allcaps;
}
add_filter( \'user_has_cap\', \'restrict_editing_old_posts\', 10, 3 );