How to Update Appache from 2.2.15 to 2.4 and PHP 5.4 to 5.6 or 5.5

Hello Guys , 

How to Update Appache from 2.2.15 to 2.4 and PHP 5.4 to 5.6 or 5.5 in order to work mpdf 

Minimum Requirement is PHP5.5 

Tried 

Quote:yum update or yum upgrade

 
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