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Install PHP 7.3 on Ubuntu 22.04

Warning! This PHP version is end-of-life!

PHP 7.3 reached end of life on 06 Dec 2021 and is no longer being updated. It's strongly recommended to upgrade to the latest version as soon as possible. You can read the official PHP migration guide here.

Installing PHP 7.3 on Ubuntu 22.04

Prerequisites

Ubuntu 22.04 LTS installed
Sudo privileges on your account
Terminal access
Internet connection

Installation

Update the package list:
```
sudo apt update
```
Add the PHP repository:
```
sudo add-apt-repository ppa:ondrej/php
```
Update the package list again:
```
sudo apt update
```
Install PHP 7.3:
```
sudo apt install php7.3
```

Install common PHP extensions:

sudo apt install php7.3-common php7.3-mysql php7.3-xml php7.3-xmlrpc php7.3-curl php7.3-gd php7.3-imagick php7.3-cli php7.3-dev php7.3-imap php7.3-mbstring php7.3-opcache php7.3-soap php7.3-zip php7.3-intl -y

Verification

Check the PHP version:

php -v

You should see output similar to:

PHP 7.3.x (cli) (built: ...) ( NTS )
Copyright (c) 1997-2018 The PHP Group
Zend Engine v3.3.x, Copyright (c) 1998-2018 Zend Technologies

Verify installed PHP modules:
```
php -m
```
This will list all installed PHP modules.
Check PHP configuration:
```
php --ini
```
This will show the location of the PHP configuration file.