[root@localhost ~]# yum install php56w-pgsql
Loaded plugins: fastestmirror, langpacks
Repository pgdg95 is listed more than once in the configuration
Repository pgdg95-source is listed more than once in the configuration
Loading mirror speeds from cached hostfile
 * base: mirrors.sohu.com
 * epel: mirror.premi.st
 * extras: mirrors.sohu.com
 * updates: mirrors.sohu.com
 * webtatic: sp.repo.webtatic.com
Resolving Dependencies
--> Running transaction check
---> Package php56w-pgsql.x86_64 0:5.6.30-1.w7 will be installed
--> Finished Dependency Resolution

Dependencies Resolved

================================================================================
 Package              Arch           Version             Repository        Size
================================================================================
Installing:
 php56w-pgsql         x86_64         5.6.30-1.w7         webtatic         107 k

Transaction Summary
================================================================================
Install  1 Package

Total download size: 107 k
Installed size: 378 k
Is this ok [y/d/N]: y
Downloading packages:
php56w-pgsql-5.6.30-1.w7.x86_64.rpm                        | 107 kB   00:02     
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
  Installing : php56w-pgsql-5.6.30-1.w7.x86_64                              1/1
  Verifying  : php56w-pgsql-5.6.30-1.w7.x86_64                              1/1

Installed:
  php56w-pgsql.x86_64 0:5.6.30-1.w7                                             

Complete!

php -m|grep -i pdo