Apache httpd.conf 不能解析php3 php5等

请问为什么我的httpd.conf文件中没有这句话：AddType application/x-httpd-php .php .phtml .php3 ？

# If the AddEncoding directives above are commented-out, then you
    # probably should define those extensions to indicate media types:
    #
    AddType application/x-compress .Z
    AddType application/x-gzip .gz .tgz
    #
    # AddHandler allows you to map certain file extensions to "handlers":
    # actions unrelated to filetype. These can be either built into the server
    # or added with the Action directive (see below)

没有话就直接上边那两行之后加这一行就可以了。