Hướng dẫn web3 php documentation

A php interface for interacting with the Ethereum blockchain and ecosystem.

Install¶

Set minimum stability to dev

"minimum-stability": "dev"

Then

composer require sc0vu/web3.php dev-master

Or you can add this line in composer.json

"sc0vu/web3.php": "dev-master"

Usage¶

New instance¶

use Web3\Web3;

$web3 = new Web3('http://localhost:8545');

Using provider¶

use Web3\Web3;
use Web3\Providers\HttpProvider;
use Web3\RequestManagers\HttpRequestManager;

$web3 = new Web3(new HttpProvider(new HttpRequestManager('http://localhost:8545')));

// timeout
$web3 = new Web3(new HttpProvider(new HttpRequestManager('http://localhost:8545', 0.1)));

You can use callback to each rpc call:¶

$web3->clientVersion(function ($err, $version) {
    if ($err !== null) {
        // do something
        return;
    }
    if (isset($client)) {
        echo 'Client version: ' . $version;
    }
});

Eth¶

use Web3\Web3;

$web3 = new Web3('http://localhost:8545');
$eth = $web3->eth;

Or

use Web3\Eth;

$eth = new Eth('http://localhost:8545');

Net¶

use Web3\Web3;

$web3 = new Web3('http://localhost:8545');
$net = $web3->net;

Or

use Web3\Net;

$net = new Net('http://localhost:8545');

Batch¶

web3

$web3->batch(true);
$web3->clientVersion();
$web3->hash('0x1234');
$web3->execute(function ($err, $data) {
    if ($err !== null) {
        // do something
        // it may throw exception or array of exception depends on error type
        // connection error: throw exception
        // json rpc error: array of exception
        return;
    }
    // do something
});

eth

$eth->batch(true);
$eth->protocolVersion();
$eth->syncing();

$eth->provider->execute(function ($err, $data) {
    if ($err !== null) {
        // do something
        return;
    }
    // do something
});

net

$net->batch(true);
$net->version();
$net->listening();

$net->provider->execute(function ($err, $data) {
    if ($err !== null) {
        // do something
        return;
    }
    // do something
});

personal

$personal->batch(true);
$personal->listAccounts();
$personal->newAccount('123456');

$personal->provider->execute(function ($err, $data) {
    if ($err !== null) {
        // do something
        return;
    }
    // do something
});

Contract¶

use Web3\Contract;

$contract = new Contract('http://localhost:8545', $abi);

// deploy contract
$contract->bytecode($bytecode)->new($params, $callback);

// call contract function
$contract->at($contractAddress)->call($functionName, $params, $callback);

// change function state
$contract->at($contractAddress)->send($functionName, $params, $callback);

// estimate deploy contract gas
$contract->bytecode($bytecode)->estimateGas($params, $callback);

// estimate function gas
$contract->at($contractAddress)->estimateGas($functionName, $params, $callback);

// get constructor data
$constructorData = $contract->bytecode($bytecode)->getData($params);

// get function data
$functionData = $contract->at($contractAddress)->getData($functionName, $params);

Assign value to outside scope(from callback scope to outside scope)¶

Due to callback is not like javascript callback, if we need to assign value to outside scope, we need to assign reference to callback.

$newAccount = '';

$web3->personal->newAccount('123456', function ($err, $account) use (&$newAccount) {
    if ($err !== null) {
        echo 'Error: ' . $err->getMessage();
        return;
    }
    $newAccount = $account;
    echo 'New account: ' . $account . PHP_EOL;
});

Examples¶

To run examples, you need to run ethereum blockchain local (testrpc).

If you are using docker as development machain, you can try ethdock to run local ethereum blockchain, just simply run docker-compose up -d testrpc and expose the 8545 port.

Develop¶

Local php cli installed¶

1. Clone the repo and install packages.

git clone https://github.com/sc0Vu/web3.php.git && cd web3.php && composer install

1. Run test script.

Docker container¶

1. Clone the repo and run docker container.

git clone https://github.com/sc0Vu/web3.php.git

1. Copy web3.php to web3.php/docker/app directory and start container.

cp files docker/app && docker-compose up -d php ganache

1. Enter php container and install packages.

docker-compose exec php ash

1. Change testHost in TestCase.php

/**
 * testHost
 * 
 * @var string
 */
protected $testHost = 'http://ganache:8545';

1. Run test script

Install packages¶

Enter container first

docker-compose exec php ash

1. gmp

apk add gmp-dev
docker-php-ext-install gmp

1. bcmath

docker-php-ext-install bcmath

Remove extension¶

Move the extension config from /usr/local/etc/php/conf.d/

mv /usr/local/etc/php/conf.d/extension-config-name to/directory