If am using yum conflict will come, it will install dependency all packages include apache, so am using source file .

@Shufil,

Why you compiling from source mysqli extension? just use yum to install it like this.

# yum install php-mysql

$ cd extname
$ phpize
$ ./configure
$ make
# make install# its seem installed correctly 

and also i have added path in php.ini, but still its not install mysqli, php -i | grep mysqli is given mysqli with details, please help me to do correctly .

@Shaun,

I tried ones and got the Apache 2.4, let me give a try again on my CentOS 6.8, will update you if I able to get it or not..