How to link php to MySQL in Linux?

[StanleyFish]

I am using Linux redhat 7.2
I just downloaded MySQL 3.23.i386 and installed it

but when I program in php to connect to MySQL after the apache web server and MySQL is started, it said it cannot connect to MySQL

Did I miss anything setting?
Does anyone know how to fix this problem?

 

[kt]

You need to install the PHP module to use MySQL. Go to Redhat's website and download this file.

You need to have that installed for PHP to interact with MySQL.