In the IIS + PHP + MySQL environment, which of the following operations does PHP. INI need to be modified? _ MySQL

IIS + PHP + MySQL environment, PHP. INI to modify the source address: http://hi.baidu.com/zhixianliu/blog/item/dbfc63f5efbdfd2cbd310946.html

Output_buffering = On

If the default 4096 is used, the PHP performance in IIS6 will be very bad.

Register_globals = Off

Extension_dir = "c:/PHP/ext"

Upload_max_filesize = 100 M

Extension = php_mbstring.dll

Extension = php_mysql.dll

Mysql. default_port = 3306 (important: I forgot to add it before, and the server error 500 has always occurred .)

Mysql. default_host = localhost

Mysql. default_user = root