version LIBXML2_2.6.28 not defined in file libxml2.so.2 with link time reference

Starting httpd: httpd: Syntax error on line 22 of /etc/httpd/conf/httpd.conf: Syntax error on line 1 of /etc/httpd/conf/extra/httpd-phpmodules.conf: Cannot load /usr/lib/apache/libphp5.so into server: /usr/lib/apache/libphp5.so: symbol xmlTextReaderSetup, version LIBXML2_2.6.28 not defined in file libxml2.so.2 with link time reference