How to install node module in php

PHP is currently one of the most popular web back-end development languages. With the development of Node.js, more and more people are beginning to use Node.js to write web applications. In this case, how to use Node.js modules in PHP programs has become a topic worth discussing. This article explains how to install and use Node.js modules in PHP programs.

1. The relationship between Node.js module and PHP program

Node.js and PHP are two completely different development languages ​​and operating environments, and their application scenarios are also different. Node.js is suitable for high-performance, real-time interactive web applications, while PHP is suitable for quickly building web applications and processing complex business logic. Although the application scenarios of the two are different, they often work together and cooperate with each other in actual web applications.

In PHP, we can use the exec or system function to execute the command line, as shown below:

<?php
$result = exec(&#39;node -e "console.log(\&#39;Hello World\&#39;)"&#39;);
echo $result; // output: Hello World
?>

The above code will execute a command line and print Hello World by executing the node command. Its output is then used as the return value of the exec function, and finally the return value is output.

In this case, we can use the exec function to execute the Node.js program and get the output results through PHP. However, this alone is not enough, because we need to use Node.js modules in actual web applications, not just execute simple command lines.

2. Install PHP extensions phpv8 and node

Using the Node.js module in a PHP program requires the installation of two PHP extensions: phpv8 and node. The phpv8 extension provides PHP extensions that support the V8 engine, and the node extension provides PHP extensions that support Node.js modules.

1. Install phpv8 extension

First, we need to download the phpv8 extension. Its source code can be found on GitHub: https://github.com/Ponup/php-v8.

Next, enter the downloaded source code directory and execute the following command:

$ phpize
$ ./configure --with-v8js=/path/to/v8
$ make
$ make install

Among them, /path/to/v8 is set to the source code directory of V8.

Finally, add the following configuration to the php.ini file:

extension=phpv8.so

2. Install the node extension

Next, we need to download the node extension. Its source code can be found on GitHub: https://github.com/tj/php-node.

Enter the downloaded source code directory and execute the following command:

$ phpize
$ ./configure
$ make
$ make install

Finally, add the following configuration to the php.ini file:

extension=node.so

3. Use the Node.js module

After installing phpv8 and node extensions, we can use the Node.js module in the PHP program. Below, we'll demonstrate how to use moment.js.

moment.js is a JavaScript date processing library that can easily manipulate dates and times. We need to use Node.js to use this library in PHP.

1. Install moment.js

After installing Node.js, open the command line and execute the following command:

$ npm install moment

2. Use moment.js

In PHP code, using the Node.js module requires first creating a V8 engine instance, then loading the module and executing the methods in the module. As shown below:

<?php

$v8 = new V8Js();
$code = &#39;var moment = require("moment"); moment().format();&#39;;
$result = $v8->executeString($code);
echo $result; // output: 2021-05-24T16:33:32+00:00

?>

In the above code, we create a V8 engine instance through the V8Js class, and then execute the JavaScript code in the $code variable. The moment.js module is loaded through the require function in the code. , and called the moment function to output the formatted string of the current time.

4. Summary

This article introduces how to install and use Node.js modules in PHP programs. By using phpv8 and node extensions, we can seamlessly use Node.js modules in PHP programs and implement more complex application logic.

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