Error: Class "Web3\Web3" not found

[despicableGruu]

Here is my composer config file.

{
    "require": {
        "web3p/web3.php": "0.3.2"
    }
}

OS: Ubuntu 22.04 (WSL) PHP version: PHP 8.1.2-1ubuntu2.19 (cli) Composer version: 2.2.6

This is my index.php file.

<?php

use Web3\Web3;

$web3 = new Web3("https://rpc.ankr.com/eth");

I run this using php index.php and got error here.

PHP Fatal error:  Uncaught Error: Class "Web3\Web3" not found in /home/user/work/index.php:5
Stack trace:
#0 {main}
  thrown in /home/user/work/index.php on line 5

Please help me to fix this error.

[NinjaCoder0516]

@despicableGruu Please add the following code snap before use Web3\Web3.

require_once "vendor/autoload.php";

[despicableGruu]

@despicableGruu Please add the following code snap before use Web3\Web3.

require_once "vendor/autoload.php";

It worked. Thanks.