需要先对交易签名，然后在发送交易。 交易签名可以使用：[https://github.com/web3p/ethereum-tx](https://github.com/web3p/ethereum-tx) 示例代码如下： ``` $web3 = new Web3(new HttpProvider(new HttpRequestManager($infura,5))); $eth = $web3->eth; $contract = new Contract($web3->provider, $contract_abi); $data = '0x' . $contract->at($contract_addr)->getData('transfer', $to_addr, '0x75BCD15')); $txParams = [ 'from' => $from_addr, 'to' => $contract_addr, 'value' => '0x0', 'nonce' => dec_to_hex($from_addr_nonce->toString()), 'gas' => $contract_transfer_gas, 'gasPrice' => dec_to_hex($gas_price->toString()), 'chainId' => $chain_id, 'data' => $data, ]; $transaction = new Transaction($txParams); $signedTransaction = $transaction->sign($from_addr_private_key); // Send the transaction $eth->sendRawTransaction('0x'. $signedTransaction, function ($err, $tx) { if ($err !== null) { err($err->getMessage()); } echo 'TX: '. $tx . PHP_EOL; }); ```