How To Install php-html-safe on Ubuntu 18.04
Introduction
In this tutorial we learn how to install php-html-safe on Ubuntu 18.04.
What is php-html-safe
php-html-safe is:
This parser strips down all potentially dangerous content within HTML:
- opening tag without its closing tag
- closing tag without its opening tag
- any of these tags: “base”, “basefont”, “head”, “html”, “body”, “applet”, “object”, “iframe”, “frame”, “frameset”, “script”, “layer”, “ilayer”, “embed”, “bgsound”, “link”, “meta”, “style”, “title”, “blink”, “xml”, etc.
- any of these attributes: on*, data*, dynsrc
- javascript:/vbscript:/about: etc. protocols
- expression/behavior etc. in styles
- any other active content
It also tries to convert code to XHTML valid, but htmltidy is far better solution for this task.
There are three methods to install php-html-safe on Ubuntu 18.04. We can use apt-get, apt and aptitude. In the following sections we will describe each method. You can choose one of them.
Install php-html-safe Using apt-get
Update apt database with apt-get using the following command.
sudo apt-get update
After updating apt database, We can install php-html-safe using apt-get by running the following command:
sudo apt-get -y install php-html-safe
Install php-html-safe Using apt
Update apt database with apt using the following command.
sudo apt update
After updating apt database, We can install php-html-safe using apt by running the following command:
sudo apt -y install php-html-safe
Install php-html-safe Using aptitude
If you want to follow this method, you might need to install aptitude first since aptitude is usually not installed by default on Ubuntu. Update apt database with aptitude using the following command.
sudo aptitude update
After updating apt database, We can install php-html-safe using aptitude by running the following command:
sudo aptitude -y install php-html-safe
How To Uninstall php-html-safe on Ubuntu 18.04
To uninstall only the php-html-safe package we can use the following command:
sudo apt-get remove php-html-safe
Uninstall php-html-safe And Its Dependencies
To uninstall php-html-safe and its dependencies that are no longer needed by Ubuntu 18.04, we can use the command below:
sudo apt-get -y autoremove php-html-safe
Remove php-html-safe Configurations and Data
To remove php-html-safe configuration and data from Ubuntu 18.04 we can use the following command:
sudo apt-get -y purge php-html-safe
Remove php-html-safe configuration, data, and all of its dependencies
We can use the following command to remove php-html-safe configurations, data and all of its dependencies, we can use the following command:
sudo apt-get -y autoremove --purge php-html-safe
References
Summary
In this tutorial we learn how to install php-html-safe package on Ubuntu 18.04 using different package management tools: apt, apt-get and aptitude.
