How to Install PHP 8.3 on Ubuntu 26.04

To install PHP 8.3 on Ubuntu 26.04, Ubuntu’s repos do not include 8.3, so add the Sury PHP repository. Do not add ppa:ondrej/php — that PPA is merging into Sury, and Launchpad has no Resolute packages.

Step 1 : Update.

sudo apt update

Step 2 : Install lsb-release, ca-certificates, and curl.

sudo apt install lsb-release ca-certificates curl

Step 3 : Fetch the Sury keyring package.

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

Step 4 : Install it.

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

Step 5 : Enable the PHP repo (lsb_release -sc is resolute on 26.04).

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 8.3 core.

sudo apt install php8.3 php8.3-cli php8.3-fpm

Step 8 : Install the usual extensions (mysql, curl, gd / imagick, xml / xsl / soap, zip, mbstring, bcmath). gettext ships in php8.3-common.

sudo apt install php8.3-mysql php8.3-curl php8.3-xsl php8.3-gd php8.3-common php8.3-xml php8.3-zip php8.3-soap php8.3-bcmath php8.3-mbstring php8.3-imagick

Step 9 : Switch the CLI default to 8.3.

sudo update-alternatives --set php /usr/bin/php8.3

Step 10 : Verify.

php -v

You have installed PHP 8.3 on Ubuntu 26.04.