Yar function for PHP function

1. Introduction to Yar

Yar is a lightweight and simple RPC framework for PHP. It uses extensions written in C to efficiently make remote procedure calls over HTTP and TCP protocols. It allows developers to remotely call server-side PHP functions without excessive configuration.

Yar is powerful and easy to use. It comes with its own server and client. The framework provides REST-style calls and support for multiple data formats such as JSON, MessagePack, and PHP serialization. Yar supports PHP 5.3 and above and HHVM.

2. Using Yar

It is very easy to use Yar. The following is a simple example:

Server code:

<?php
function multiply($a, $b)
{
    return $a * $b;
}

$service = new Yar_Server(array("multiply"));
$service->handle();
?>

The above code defines a PHP function named "multiply". This function takes two input parameters $a and $b, and it returns the product of these two parameters.

On the server side, we create a Yar service instance through new Yar_Server(array("multiply")), and then call the handle() method to start the service. In this way, we can get the results by calling the multiply function remotely.

Client code:

<?php
$client = new Yar_Client("http://example.com/multiply.php");
$result = $client->multiply(4, 5);
echo $result;
?>

The above code creates a Yar client object named $client and calls the multiply function to get the result. In this example, we pass 4 and 5 as input parameters to the multiply function, and it will return the product, which is 20.

Note: Client code and server code must run on different computers.

3. Characteristics of Yar function

The main characteristics of Yar function are as follows:

1. Efficiency: Yar uses an extension written in C, making full use of PHP's multi-threading features. It can handle multiple requests simultaneously without blocking, thus improving performance efficiency.

2. Cross-language support: The Yar framework not only supports PHP, but also supports multiple programming languages ​​such as Java, C, Python, and Ruby. This means you can use different programming languages ​​to write the client and server.

3. Security: Yar supports HTTPS protocol and JSON Web Token (JWT) authentication protocol, which can provide higher security guarantee.

4. Real-time: Yar supports long connection protocol and event mechanism, which can realize real-time data transmission.

5. Precautions for use

You need to pay attention to the following points when using Yar:

1. The server needs to install the Yar extension, and the client does not need to install it.

2. When writing server code, be sure to ensure that the computer where the server is located can be accessed and that Yar related services and ports are enabled.

3. Do not use too many input parameters and return values ​​in the Yar function. The size of input parameters and return values ​​directly affects the response speed of remote calls.

4. When making remote calls, ensure that the communication between the client and the server is reliable. If there are network problems during the transfer, the call may fail.

6. Summary

Yar is a lightweight and simple RPC framework that can perform remote procedure calls in an efficient manner. It provides a server and a client, supports multiple data formats and multiple programming languages, and has the characteristics of high efficiency, cross-language support, security and real-time performance. When using Yar, you need to pay attention to the control of input parameters and return values, as well as the reliability of network communication.

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