我空间的PHP.ini文件版主帮看下

俺刚学做站，这个东西说明我空间都开启了什么东西，或者支持什么？特别是[zend]后面这两段代码表示什么？

register_globals = off
allow_url_fopen = off
expose_php = Off
max_input_time = 60
variables_order = "EGPCS"
extension_dir = ./
upload_tmp_dir = /tmp
precision = 12
SMTP = relay-hosting.secureserver.net
url_rewriter.tags = "a=href,area=href,frame=src,input=src,form=,fieldset="
[Zend]
zend_extension=/usr/local/zo/ZendExtensionManager.so
zend_extension=/usr/local/zo/4_3/ZendOptimizer.so

最后两行说明安装了ZendOptimizer