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With the popularity of Ethereum in the blockchain world, more and more people are paying attention to how to obtain Ethereum data. In addition to viewing Ethereum's transaction records and block information through the Ethereum browser, you can also obtain Ethereum data through the PHP language. This article will introduce how to use PHP to obtain Ethereum data.
First, we need to use the Ethereum node API to communicate with the Ethereum network. The Ethereum node API is an interface provided by the Ethereum client, which can obtain Ethereum data through the API in HTTP or WebSocket format. Currently, the more popular Ethereum node APIs include Infura, Etherscan, etc. Here we take the Infura API as an example to illustrate.
We need to first register an account of Infura API and create a project to obtain the token. The registration address is: https://infura.io/register. After successful registration, we can create a project in the console to obtain the token.
We need to use the Ethereum-PHP library to send HTTP or WebSocket requests to communicate with the Infura API. Use Composer to install the Ethereum-PHP library. Composer is a package management tool for PHP that can manage the dependencies of our project. We can use the following command to install the Ethereum-PHP library:
composer require ethereum-php/ethereum-php
We can use the interface provided by the Ethereum-PHP library to get Ether Block information. The following is a sample code to get the latest block:
$infuraUrl = "https://mainnet.infura.io/v3/your-infura-project-id"; // Infura API 的 URL
$ethereum = new \Ethereum\RPC($infuraUrl); // 创建 Ethereum-PHP 实例
$latestBlock = $ethereum->eth_blockNumber(); // 获取最新区块号
$latestBlockNumber = hexdec($latestBlock); // 转换为十进制的区块号
$block = $ethereum->eth_getBlockByNumber("0x" . dechex($latestBlockNumber)); // 获取 Block 对象
In the above code, we first need to replace the URL of the Infura API and our own project ID with specific values. Then, we created an Ethereum-PHP instance and used the eth_blockNumber function to get the latest block number and convert it to a decimal number. Finally, use the eth_getBlockByNumber function to obtain the latest block object.
We can use the interface provided by the Ethereum-PHP library to obtain Ethereum transaction records. The following is a sample code to obtain the latest transaction:
$infuraUrl = "https://mainnet.infura.io/v3/your-infura-project-id"; // Infura API 的 URL
$ethereum = new \Ethereum\RPC($infuraUrl); // 创建 Ethereum-PHP 实例
$latestBlock = $ethereum->eth_blockNumber(); // 获取最新区块号
$latestBlockNumber = hexdec($latestBlock); // 转换为十进制的区块号
$block = $ethereum->eth_getBlockByNumber("0x" . dechex($latestBlockNumber)); // 获取最新的区块
$transaction = $ethereum->eth_getTransactionByHash($block->transactions[0]); // 获取最新一笔交易
In the above code, we first obtain the Block object of the latest block as above, and then use the eth_getTransactionByHash function to obtain the first block in the latest block Transaction object of a transaction.
In addition to the above sample code, the Ethereum-PHP library also provides a rich interface to obtain all transactions of the block, the balance of the address, the ABI and code of the smart contract and other information.
Summary
This article explains in detail how to use PHP to obtain Ethereum data. First we need to register an Infura API account and create a project to obtain the token. Then, we install the Ethereum-PHP library through Composer and use the interface provided by the Ethereum-PHP library to obtain Ethereum data. If you want to learn more about the use of the Ethereum-PHP library, you can refer to the official documentation of the Ethereum-PHP library.
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