How To Install php-PhpOption on CentOS 7
Introduction
In this tutorial we learn how to install php-PhpOption on CentOS 7.
What is php-PhpOption
This package adds an Option type for PHP. The Option type is intended for cases where you sometimes might return a value (typically an object), and sometimes you might return no value (typically null) depending on arguments, or other runtime factors. Often times, you forget to handle the case where no value is returned. Not intentionally of course, but maybe you did not account for all possible states of the system; or maybe you indeed covered all cases, then time goes on, code is refactored, some of these your checks might become invalid, or incomplete. Suddenly, without noticing, the no value case is not handled anymore. As a result, you might sometimes get fatal PHP errors telling you that you called a method on a non-object; users might see blank pages, or worse. On one hand, the Option type forces a developer to consciously think about both cases (returning a value, or returning no value). That in itself will already make your code more robust. On the other hand, the Option type also allows the API developer to provide more concise API methods, and empowers the API user in how he consumes these methods. Autoloader
We can use yum or dnf to install php-PhpOption on CentOS 7. In this tutorial we discuss both methods but you only need to choose one of method to install php-PhpOption.
Install php-PhpOption on CentOS 7 Using yum
Update yum database with yum using the following command.
sudo yum makecache
After updating yum database, We can install php-PhpOption using yum by running the following command:
sudo yum -y install php-PhpOption
Install php-PhpOption on CentOS 7 Using dnf
If you don’t have dnf installed you can install DNF on CentOS 7 first.
Update yum database with dnf using the following command.
sudo dnf makecache
After updating yum database, We can install php-PhpOption using dnf by running the following command:
sudo dnf -y install php-PhpOption
How To Uninstall php-PhpOption on CentOS 7
To uninstall only the php-PhpOption package we can use the following command:
sudo dnf remove php-PhpOption
References
Summary
In this tutorial we learn how to install php-PhpOption on CentOS 7 using yum and dnf.
