Когда то пользовался вот этим:
https://github.com/Fenguoz/tron-php
В библиотеке есть функция generateAddress.
Пример:
use GuzzleHttp\Client;
$uri = 'https://api.trongrid.io';// mainnet
// $uri = 'https://api.shasta.trongrid.io';// shasta testnet
$api = new \Tron\Api(new Client(['base_uri' => $uri]));
$trxWallet = new \Tron\TRX($api);
$addressData = $trxWallet->generateAddress();
// $addressData->privateKey
// $addressData->address
$config = [
'contract_address' => 'TR7NHqjeKQxGTCi8q8ZY4pL8otSzgjLj6t',// USDT TRC20
'decimals' => 6,
];
$trc20Wallet = new \Tron\TRC20($api, $config);
$addressData = $trc20Wallet->generateAddress();