无法将modules / libphp5.so加载到服务器：/etc/httpd/modules/libphp5.so：undefined symbol：unixd_config

Question

当我运行sudo systemctl start httpd.service时，我得到了这个。

apachectl[18382]: httpd: Syntax error on line 172 of /etc/httpd/conf/httpd.conf: Cannot load modules/libphp5.so into server: /etc/httpd/modules/libphp5.so: undefined symbol: unixd_config

环境：来自AUR的Archlinux 3.10.10.1 x86_64 + php5.5.3 + apache24。