Updating to PHP 5.4

Hello everyone,

I have my wordpress website on an AWS EC2 and today I updated my php to 5.4 using the following scripts :

sudo yum remove httpd* php*
sudo yum install httpd24 php54

Now I need to reinstall the mysql modules so anybody can tell me how to do that? I try to use the following script: sudo install php php-mysql and I get the following error: Error: httpd24 conflicts with httpd-2.2.31-1.7.amzn1.x86_64
Error: php54-cli conflicts with php-cli-5.3.29-1.8.amzn1.x86_64
Error: php54-common conflicts with php-common-5.3.29-1.8.amzn1.x86_64
Error: httpd24-tools conflicts with httpd-tools-2.2.31-1.7.amzn1.x86_64

Would anybody help me on this please?

Thanks.