A thorough solution to the installation and version switching of PHP on Ubuntu

The official source of Ubuntu, such as the Ubuntu14.04 default source is the php5.6.x, Ubuntu16.04 default source is php7.0.x, then if you want to install Ubuntu16.04 on php7.1,php7.2, what should I do?

The answer is to install from a third-party source, ppa:ondrej/php is a well-known PHP source (currently maintaining php5.6,php7.0,php7.1,php7.2). Use this source to install the PHP version you want.

2. Installing PHP from the source

   sudo add-apt-repository ppa:ondrej/phpsudo apt-get updatesudo apt-get upgradesudo apt-get install php7.1   # for PHP 7.1sudo apt-get install php7.0   # for PHP 7.0sudo apt-get install php5.6   # for PHP 5.6

3. Install the relevant version of the PHP module

   sudoApt-cache Search php7*...Php-all-dev-Package depending on all supported PHP development packagesphp7.0-Server-side, html-embedded scripting language (metapackage)php7.0-cgi-Server-side, html-embedded scripting language (CGI binary)php7.0-cli-Command-Line interpreter for the PHP scripting languagePhp7.0-common-documentation, examples and common module for PHPPhp7.0-curl-CURL Module for PHPPhp7.0-dev-Files for PHP7.0 module developmentPHP7.0-GD-GD Module for PHPPhp7.0-gmp-GMP Module for PHP.........Php7.1-xml-DOM, SimpleXML, WDDX, XML, and XSL module for PHPPhp7.1-xmlrpc-Xmlrpc-epi Module for PHPPhp7.1-zip-Zip Module for PHPPhp7.1-opcache-Zend Opcache Module for PHPphp7.1-Server-side, html-embedded scripting language (metapackage)php7.1-xsl-XSL module for PHP (dummy)......Php7.2-bcmath-Bcmath Module for PHPphp7.2-bz2-BZIP2 Module for PHPphp7.2-cgi-Server-side, html-embedded scripting language (CGI binary)php7.2-cli-Command-Line interpreter for the PHP scripting languagePhp7.2-common-documentation, examples and common module for PHPPhp7.2-curl-CURL Module for PHPPHP7.2-DBA-DBA Module for PHP

5. Select the required modules, install the

   sudo apt-get install php7.2-curl php7.2-dev php7.2-gd php7.2-imap php7.2-intl php7.2-mbstring php7.2-mysql php7.2-xml php7.2-zip

7. Switch PHP version

   sudo update-alternatives --config php

9. Set Apache to run with the correct PHP version

   sudo a2dismod php7.1         # unload the current versionsudo a2enmod  php5.6         # load the version you needsudo# restart webserver to apply

At the end of this, there is no need to worry about installing PHP, switching PHP versions of these things.

Reference:

• https://askubuntu.com/questions/109404/how-do-i-install-different-upgrade-or-downgrade-php-version-in-still-supported
• https://tecadmin.net/install-php-7-on-ubuntu/

A thorough solution to the installation and version switching of PHP on Ubuntu