Your host needs to use PHP 5.3.1 or higher to run this version of Joomla!
Alot of friends new in joomla 3.x have problem with Joomla 3.x installation they got error : Your host needs to use PHP 5.3.1 or higher to run this version of Joomla!
2 bests easy solutions for you to solved it.
1. use hosting controlpanel:
- Login controlpanel
- Open PHP Configuration to check PHP
- Dropdow to select PHP 5 and save
2. Use .Htacess file to fix it
Using your FTP client connect to folder into which you’ve installed Joomla.
- Rename htaccess.txt to .htaccess
- Open .htaccess to edit the file
- Add the following to the top of the .htaccess file
CODE : AddType application/x-httpd-php53 .php