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Install PHP 8.1 on Ubuntu 24.04

Warning! This version of PHP is outdated.

PHP 8.1 reached end of active support on 25 Nov 2023. As of today, PHP 8.1 is only receiving security related updates through 31 Dec 2025, at which point it will be considered end-of-life and receive no further updates. It's strongly recommended to upgrade to the latest version of PHP before then.

Installing PHP 8.1 on Ubuntu 24.04

Prerequisites

Ubuntu 24.04 system
User account with sudo privileges
Terminal access
Internet connection

Installation

Update the package list:
```
sudo apt update
```

Install PHP 8.1 and common extensions:

sudo apt install php8.1 php8.1-cli php8.1-common php8.1-curl php8.1-mbstring php8.1-mysql php8.1-xml

Wait for the installation to complete. This may take a few minutes.

Verification

Check the installed PHP version:
```
php -v
```
You should see output similar to:
```
PHP 8.1.x (cli) (built: ...) (...)
```
Verify PHP CLI is working:
```
php -r "echo 'PHP is working!';"
```
Check installed PHP modules:
```
php -m
```