apache2.4.4启用deflate压缩
今天在看《高性能php应用开发》这本书，说道如何启用mod_deflate：
启用如下模块：
LoadModule deflate_module modules/mod_deflate.so
然后加入指令：
AddOutputFilterByType DEFLATE text/html text/plain text/xml
即可。
但是发现老是出错，
Invalid command 'AddOutputFilterByType', perhaps misspelled or defined by a module not included in the server configuration
去百度查看下，未果，之后发现官方有段话：
Invalid command 'AddOutputFilterByType', perhaps misspelled or defined by a module not included in the server configuration -AddOutputFilterByType has moved from the core to mod_filter, which must be loaded.
原来，除了启用deflate之外，还要启用mod_filter，找到这句：
LoadModule filter_module modules/mod_filter.so
去除前面的分号，终于好了！
