首先，使用PHP生成以太坊ETH地址需要你引入第三方的composer包，composer.json配置如下

{
    "require": {
        "bitwasp/bitcoin": "^1.0",
        "iexbase/tron-api": "^4.0",
        "bitwasp/buffertools": "^0.5.7",
        "stephenhill/base58": "^1.1",
        "kornrunner/keccak": "^1.1",
        "web3p/web3.php": "^0.3.2",
        "elliptic/elliptic-sdk": "^0.8.0",
        "ramsey/uuid": "^3.9"
    }
}

然后运行命令composer install安装composer依赖包。
创建一个eth.php文件，代码如下：

<?php

require 'vendor/autoload.php';

use Web3\Web3;
use Web3\Contract;
use Web3p\EthereumTx\Transaction;
use Web3\Utils;
use kornrunner\Keccak;
use Elliptic\EC;

class ETH {
    //生成钱包
    public function generateWallet() {
        try {
            $ec = new EC('secp256k1');
            $key = $ec->genKeyPair();
            $privateKey = $key->getPrivate('hex');
            $publicKey = $key->getPublic(false, 'hex');
            $publicKeyHex = substr($publicKey, 2);
            $publicKeyBin = hex2bin($publicKeyHex);
            $publicKeyHash = Keccak::hash($publicKeyBin, 256);
            $address = '0x' . substr($publicKeyHash, -40);
        } catch (Exception $e) {
            echo "发生错误: " . $e->getMessage();
        }
        echo '钱包地址：' . $address . '<br>';
        echo '公钥：' . $publicKey . '<br>';
        echo '私钥：' . $privateKey . '<br>';
    }
}

$eth = new ETH();
//循环生成100个钱包
for ($i = 0; $i < 100; $i++) {
    $eth->generateWallet();
    echo '<hr />'
}

访问这个eth.php文件，就可以一次性生成100个以太坊钱包地址了。