If you put this in your config.php, then all of the log messages will be sent to the Apache error log:
$cfg->log_dbg_targets = LOG_TARGET_ERRORLOG;
$cfg->log_info_targets = LOG_TARGET_ERRORLOG;
$cfg->log_warn_targets = LOG_TARGET_ERRORLOG;
$cfg->log_environ_targets = LOG_TARGET_ERRORLOG;
Cheers,
Francois
]]>