To install PHP on your system, follow these steps:

1. Choose a method of installation:
– If you are using a Linux distribution, you can use the package manager to install PHP. For example, on Ubuntu, you can run `sudo apt install php`.
– If you are using macOS, you can use Homebrew to install PHP. Run `brew install php`.

2. Check if PHP is installed by running `php -v` in the terminal. You should see the version of PHP installed if it is installed correctly.

3. Install any additional PHP extensions or modules that you might need. You can use the package manager or use the `pecl` command to install extensions manually.

4. Configure PHP by editing the `php.ini` file. This file contains various settings that you can modify to customize PHP behavior. The location of the `php.ini` file varies depending on the operating system and installation method. You can find the location of the file by running `php –ini` in the terminal.

5. Start the PHP server or integrate PHP with your web server. If you are just running PHP scripts locally, you can use the built-in PHP development server. Run `php -S localhost:8000` to start the server.

6. Test PHP by creating a simple PHP file and accessing it through a web browser. For example, create a file called `index.php` with the following content: