Lightweight application development and deployment using PHP and Google Cloud Functions

In the current era of cloud computing and Web applications, more and more businesses require lightweight applications to complete, so it is very suitable to use Google Cloud Functions and PHP to achieve lightweight application development and deployment.

Google Cloud Functions is a method based on event triggering and serverless computing. Users only need to write code to handle these events without the need to manage services or maintain servers. Furthermore, PHP is a popular programming language that is widely used for web development.

This article will delve into how to use PHP and Google Cloud Functions to develop lightweight applications, and introduce how to deploy on Google Cloud.

Install PHP and Google Cloud SDK

Before you start, you need to make sure that PHP and Google Cloud SDK are installed.

You can check whether PHP is installed correctly by running the following command:

php -v

If PHP has been successfully installed, the installed version information will be displayed.

To install the Google Cloud SDK, please follow the guidelines provided in the Google Cloud documentation.

Create Google Cloud Functions

First, you need to create a new cloud function in the Google Cloud Console.

1. Select "Cloud Functions" from the left menu bar and click the "Create Function" button.
2. Enter the function name, such as "helloWorld".
3. Select "HTTP trigger" as the trigger type.
4. Select "Allow unauthenticated invocations" to allow unauthenticated invocations.
5. Set the executable file to "composer" and enter the address pointing to the file.
6. Set the PHP version to "PHP 7.3" in the advanced options and click the "Creat" button.

Now, a function named "helloWorld" has been created.

Next, you need to write the PHP code required for the function.

Writing PHP code

Here is a simple PHP function example:

<?php
function helloWorld($request) {
    $name = $request->getQueryParams()['name'] ?? 'World';
    return sprintf('Hello, %s!', $name);
}

This function gets the value of "name" from the url parameter and returns it using the sprintf function A greeting.

Deploying the application

After the code is written, it needs to be deployed to Google Cloud.

1. Deploy the code to Google Cloud using the following command:

gcloud functions deploy helloWorld --runtime php73 --trigger-http --allow-unauthenticated

2. After running the command, it will automatically upload the code to Google Cloud Functions and create a is the function of "helloWorld".
3. Once completed, you can see the "helloWorld" function in the function list in the Google Cloud Console.

Now that the function is ready to receive HTTP requests, you can test the application by entering the following URL in your browser:

https://[region-name]-[project-id].cloudfunctions.net/helloWorld?name=John

Where, [region-name] and [ project-id] needs to be replaced with your actual project information from the Google Cloud Console.

When the browser prints "Hello, John", it means that the application has returned the greeting accurately.

Summary

In this article, we introduce how to use Google Cloud Functions and PHP to achieve the development and deployment of lightweight applications. By following these simple steps, you can easily write, deploy, and manage functions to create efficient, scalable, and powerful web applications.

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