Error Logging on a Per-Domain basis [to apache logs]

I have tried setting as follows in my .htaccess and in my apache server logs: php_value error_log "/path/to/log.file" php_flag log_errors On And it doesn't seem to do anything. I am already logging to each virtual hosts' error log for http-related logs [such as not found, etc]. Is there any way to put PHP error logs into the same files that Apache logs to as opposed to the master log file? That seems to make an enormous amounts of sense on mutli-user machines (and if there is no error log set for the virtual host, it should use the server log). Is this feature implemented? Could it be? -- Mike