我看了一下wp_revisions_to_keep() 作用有一个过滤器叫做wp_revisions_to_keep 覆盖的值WP_POST_REVISIONS.

下面是一个未经测试的示例（PHP 5.4+）：

add_filter( \'wp_revisions_to_keep\', function( $num, $post )
{
    // Post Types and Revision Numbers - Edit to your needs
    $config = [
        \'post\' => 10,
        \'page\' => 9,
        \'cpt\'  => 8
    ];

    // Get the current post type
    $post_type = get_post_type( $post );

    // Override the WP_POST_REVISIONS value
    if( isset( $config[$post_type] ) && is_int( $config[$post_type] ) )
        $num = $config[$post_type];

    return $num;
}, 10, 2 );