Install Apache with PHP (this is PHP 5.1.6):
yum install php php-devel php-gd php-imap php-ldap php-mysql php-odbc php-pear php-xml php-xmlrpc curl curl-devel perl-libwww-perl ImageMagick libxml2 libxml2-devel
edit /etc/httpd/conf/httpd.conf:
vi /etc/httpd/conf/httpd.conf
and change DirectoryIndex to
[…]
DirectoryIndex index.html index.htm index.shtml index.cgi index.php index.php3 index.pl
[…]
restart httpd
service httpd restart
