How do I enable PHP extensions on CentOS to finally finish installing/configuring Drupal? I am trying to install Drupal 8.0.5 (a standard profile) on Apache 2.4.6 on CentOS 7, with PHP 5.6.19.  But in the GUI, I get a problem on the requirements page.  It says "PHP extensions disabled.  Drupal requires you to enable the PHP extensions in the following list... gd"

I have installed, with yum install these packages: gd, gd-devel, php-gd, php-pdo php-mbstring, php-xml.

I have installed various other packages.  I have no reason to think that PHP gd extensions have not been enabled.  They've certainly been installed.  I've restarted Apache services and MariaDB services. I've rebooted the sever.  

I reinstalled Drupal and PHP.  I created a php.ini file with "extension=gd.so" as the content.  A minimal installation fails for the same reason.

What should I do to get Drupal working for the first time?  I have never done this before.  How do I enable the PHP Extensions?  Or is the message false?  If it is, what should I do?
On CentOS, you should have an icon in cPanel for "PHP Selector":



In CloudLinux:



Make sure all of the PHP extensions installed by Yum are enabled &amp; save the settings. Then create or open the info.php page for your domain to confirm the configuration. The problem should be fixed on the Drupal 8 status report.

Note: If you are having problems with installing PHP extensions for a web server running Drupal, consider installing Composer on CentOS. Composer is designed to streamline dependency management in PHP and manages the particular download files required by Drupal 8 modules specifically.