Installing on Debian and php8.0 without compiling v8

The installation below was tested on Debian GNU/Linux 12 64-bits machine and the module installed in PHP 8.0.

Let's get started.

Installing dependencies

# Dependencies
sudo apt-get install build-essential curl git python-is-python3 libglib2.0-dev

# V8
sudo apt update
sudo apt install libnode-dev --fix-missing
sudo apt --fix-broken install

# PHP
sudo apt install -y apt-transport-https lsb-release ca-certificates wget
sudo wget -O /etc/apt/trusted.gpg.d/php.gpg https://packages.sury.org/php/apt.gpg
echo "deb https://packages.sury.org/php/ $(lsb_release -sc) main" | sudo tee /etc/apt/sources.list.d/php.list
sudo apt install -y php8.0 php8.0-dev php8.0-cli

Installing v8

This will build the latest stable version as of this moment used by Chromium and Chrome (7.5.288.23). You can find the currently latest stable versions here, found in the column v8_version.

/!\ DONT FORGET TO REPLACE THE V8 VERSION NUMBER, IT WON'T WORK IF YOU DON'T DO THAT

# Create directory in /opt/v8
sudo mkdir /opt/v8
sudo mkdir /opt/v8/include
sudo mkdir /opt/v8/lib

# Copy v8 from /usr/lib/x86_64-linux-gnu/
cp /usr/lib/x86_64-linux-gnu/*v8*
cp /usr/lib/x86_64-linux-gnu/*node*

# Copy V8 include files need to /opt/v8/include
cp -r /usr/include/v8/* /opt/v8/include/

Installing php-v8js

Now that v8 is installed, we can compile the module for PHP version(s). For the system PHP the workflow is as follows:

cd /opt/
git clone https://github.com/phpv8/v8js.git
cd v8js
phpize
./configure --with-v8js=/opt/v8 LDFLAGS="-lstdc++"
sudo make
sudo make test
sudo make install

After sudo make install the location of the v8js.so module will be shown.

Enable the module in your php.ini

Add extension=v8js.so to your php.ini file. You can check the location of you php.ini file via php --ini.