不wp-config.php 可以具有颗粒常量。像这样：

if ( \'example.com\' == $_SERVER[\'HTTP_HOST\'] ) 
{
    define( \'WP_POST_REVISIONS\', 1 );
} 
elseif ( \'blog1.example.com\' == $_SERVER[\'HTTP_HOST\'] ) 
{
    define( \'WP_POST_REVISIONS\', 5 );
}
elseif ( \'blog2.example.com\' == $_SERVER[\'HTTP_HOST\'] ) 
{
    define( \'WP_POST_REVISIONS\', 10 );
}