How to enable mysqli on Centos 7?

Question

PHP

How to enable mysqli on Centos 7?
There is mysqli.so in /usr/lib64/php/modules directory
"php -m" doesn't output mysqli
I entered in php.ini :
"extension=mysqli.so"
all the same.

Answer 1

1. Extension_dir should look like this:
after ./ add the folder where the extensions are located, for example ext.
2. Uncomment this line:
3. Restart apache:
service apache2 restart

Answer 2

I solved the problem like this:
I demolished an incomprehensible version of mysql, put mariadb.
Then yum install php-mysqli
And in php.ini returned everything by default.