How to Install PHP 8.4 on Ubuntu 26.04

To install PHP 8.4 on Ubuntu 26.04, add packages.sury.org — Ubuntu’s repos do not include 8.4 (FPM socket: /run/php/php8.4-fpm.sock). This is the same Ondřej PHP source as ppa:ondrej/php, now canonical at Sury on 26.04.

Step 1 : Update.

sudo apt update

Step 2 : Install tools used to add the repo.

sudo apt install lsb-release ca-certificates curl

Step 3 : Download the keyring.

sudo curl -sSLo /tmp/debsuryorg-archive-keyring.deb https://packages.sury.org/debsuryorg-archive-keyring.deb

Step 4 : Install the keyring.

sudo dpkg -i /tmp/debsuryorg-archive-keyring.deb

Step 5 : Add packages.sury.org for this release.

echo "deb [signed-by=/usr/share/keyrings/debsuryorg-archive-keyring.gpg] https://packages.sury.org/php/ $(lsb_release -sc) main" | sudo tee /etc/apt/sources.list.d/php.list

Step 6 : Update again.

sudo apt update

Step 7 : Install PHP 8.4, CLI, and PHP-FPM.

sudo apt install php8.4 php8.4-cli php8.4-fpm

Step 8 : Add common extensions: mysql, curl, gd / imagick, xml / xsl / soap, zip, mbstring, bcmath. gettext is in php8.4-common.

sudo apt install php8.4-mysql php8.4-curl php8.4-xsl php8.4-gd php8.4-common php8.4-xml php8.4-zip php8.4-soap php8.4-bcmath php8.4-mbstring php8.4-imagick

Step 9 : Make php run 8.4.

sudo update-alternatives --set php /usr/bin/php8.4

Step 10 : Check the version.

php -v

You have installed PHP 8.4 on Ubuntu 26.04.