Thread Safety

Thread Safety means that binary can work in a multithreaded webserver context

Default: disabled

使用環境:

Apache + mod_prefork : disabled  (rely on the operating system to separate context )
Apache + FastCGI: disabled
Apache + mod_mpm: enabled
IIS: enable

Virtual Directory

emulate a "Virtual Directory" build using mod_rewrite to rewrite input to a script in another location.