HTTPD : [warn] module php5_module is already loaded, skipping
Once you have completed installation and configuration the Apache, PHP and MySQL in Linux system.
If you have gotten below warning message when you starting the Apache web-server.
starting httpd: [Wed Feb 06 00:20:44 2013] [warn] module php5_module is already loaded, skipping
You have two of the lines in your httpd.conf: LoadModule php5_module /usr/lib/apache/libphp5.so
May be the LoadModule configured two of the lines in httpd.conf and conf.d/php.conf, to check in both configuration file and remove that line from any one of the files
Finally, restart the Apache server