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sudo apt show php

OR

sudo apt show php -a

sudo apt install php

Install PHP (5.6, 7.0, 7.1) on Ubuntu Using PPA

1. First start by adding Ondřej Surý PPA to install different versions of PHP – PHP 5.6, PHP 7.0 and PHP 7.1 on Ubuntu system.

sudo apt install python-software-properties

sudo add-apt-repository ppa:ondrej/php

Add PPA in Ubuntu

Add PPA in Ubuntu

2. Next, update the system as follows.

sudo apt-get update

3. Now install different supported versions of PHP as follows. For Apache Web Server

sudo apt install php5.6 [PHP 5.6]

sudo apt install php7.0 [PHP 7.0]

sudo apt install php7.1 [PHP 7.1]

For Nginx Web Server

sudo apt install php5.6-fpm [PHP 5.6]

sudo apt install php7.0-fpm [PHP 7.0]

sudo apt install php7.1-fpm [PHP 7.1]

4. To install any PHP modules, simply specify the PHP version and use the auto-completion functionality to view all modules as follows.

------------ press Tab key for auto-completion ------------

sudo apt install php5.6

sudo apt install php7.0

sudo apt install php7.1

Search PHP Modules

Search PHP Modules

5. Now you can install most required PHP modules from the list.

------------ Install PHP Modules ------------ sudo apt install php5.6-cli php5.6-xml php5.6-mysql

sudo apt install php7.0-cli php7.0-xml php7.0-mysql

sudo apt install php7.1-cli php7.1-xml php7.1-mysql

6. Finally, verify your default PHP version used on your system like this.

$ php -v

Check Default PHP Version in Ubuntu

Check Default PHP Version in Ubuntu

Set Default PHP Version in Ubuntu

7. You can set the default PHP version to be used on the system with the update-alternatives command, after setting it, check the PHP version to confirm as follows.

------------ Set Default PHP Version 5.6 ------------

$ sudo update-alternatives --set php /usr/bin/php5.6

Set PHP 5.6 Version in Ubuntu

Set PHP 5.6 Version in Ubuntu

------------ Set Default PHP Version 7.0 ------------ $ sudo update-alternatives --set php /usr/bin/php7.0

Set PHP 7.0 Version in Ubuntu

Set PHP 7.0 Version in Ubuntu

------------ Set Default PHP Version 7.1 ------------ $ sudo update-alternatives --set php /usr/bin/php7.1

Set PHP 7.1 Version in Ubuntu

Set PHP 7.1 Version in Ubuntu

8. To set the PHP version that will work with Apache web server, use the commands below. First disable the current version with the a2dismod command and then enable the one you want with the a2enmod command.

$ sudo a2dismod php7.0 $ sudo a2enmod php7.1 $ sudo systemctl restart apache2

Enable Disable PHP Modules for Apache

Enable Disable PHP Modules for Apache

9. After switching from one version to another, you can find your PHP configuration file, by running the command below.

------------ For PHP 5.6 ------------ $ sudo update-alternatives --set php /usr/bin/php5.6 $ php -i | grep "Loaded Configuration File" ------------ For PHP 7.0 ------------ $ sudo update-alternatives --set php /usr/bin/php7.0 $ php -i | grep "Loaded Configuration File" ------------ For PHP 7,1 ------------ $ sudo update-alternatives --set php /usr/bin/php7.1 $ php -i | grep "Loaded Configuration File"

Find PHP Configuration File

Find PHP Configuration File