I have installed latest versions of both apache and php but after the php is installed and necessary changes are made to the httpdconf file I can not start the apache server. This is the error i get:

Cannot load /usr/local/apache2/modules/libphp5.so into server: /usr/local/apache2/modules/libphp5.so: undefined symbol: zend_parse_parameters

Please suggest. I have done a clean install and everything is ok