2025-05-19

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Version Before Upgrading to v8.3
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Server API: FPM/FastCGI
PHP Version 8.1.27

user@php80ub20:~$ php -v
PHP 8.1.27 (cli) (built: Dec 21 2023 20:19:26) (NTS)
Copyright (c) The PHP Group
Zend Engine v4.1.27, Copyright (c) Zend Technologies
    with Zend OPcache v8.1.27, Copyright (c), by Zend Technologies
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ChatGPT Session
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How do I install the latest PHP to an ubuntu server?
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Here’s the standard, reliable way admins keep an Ubuntu box on the newest PHP release (works for 20.04 LTS, 22.04 LTS, and newer):

bash
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# 1. Update package lists & basic tools
sudo apt update
sudo apt install -y software-properties-common ca-certificates lsb-release apt-transport-https curl

# 2. Add Ondřej Surý’s PHP PPA – he maintains the up-to-date builds
sudo add-apt-repository ppa:ondrej/php

# 3. Refresh and install the current stable version (today that’s 8.3)
sudo apt update
sudo apt install -y php8.3

# 4. (Optional) pull in common extensions you’ll probably need
sudo apt install -y php8.3-{cli,fpm,common,mbstring,xml,zip,curl,gd,intl,bcmath,pgsql,mysql}

# 5. Make sure the new PHP is the one in use
php -v        # should read “PHP 8.3.x …”
which php     # usually /usr/bin/php
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If you’re running PHP-FPM with Nginx or Apache:

# Enable the new FPM pool
sudo systemctl restart php8.3-fpm

# Apache: switch the module & restart
sudo a2dismod php7.4            # disable old, adjust version if different
sudo a2enmod  php8.3
sudo systemctl restart apache2
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After Installation
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auser@php80ub20:~$ php -v
PHP 8.3.21 (cli) (built: May  9 2025 06:26:54) (NTS)
Copyright (c) The PHP Group
Zend Engine v4.3.21, Copyright (c) Zend Technologies
    with Zend OPcache v8.3.21, Copyright (c), by Zend Technologies
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Server API	FPM/FastCGI
PHP Version 8.3.21
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