PHP程序员如何利用web3.php进行以太坊开发 - 区块链技术 - BitMere

web3.php是一个PHP接口，主要用于与以太坊区块链及其生态系统进行交互.
安装
通过Composer来管理依赖关系，首先将minimum-stability设置为dev
"minimum-stability": "dev"
然后执行：
composer require sc0vu/web3.php dev-master
或者你可以在composer.json中添加这行。

"sc0vu/web3.php": "dev-master"
用法
实例

use Web3\Web3;% C3 b* ~5 S5 S
$web3 = new Web3('http://localhost:8545');9 ~- E$ }) w& W: a
接口调用$ M# q" m8 i& P: T) t$ j4 b
use Web3\Web3; p- U% q2 Q+ V8 d( ^
use Web3\Providers\HttpProvider;% j$ J, ?% H2 |0 p, Q2 J
use Web3\RequestManagers\HttpRequestManager;8 E1 g" n! o6 C) t* g+ C
$web3 = new Web3(new HttpProvider(new HttpRequestManager('http://localhost:8545')));7 f2 { Z4 M7 h4 y
// timeout2 Z: v* ~8 w: m4 Z: {; N
$web3 = new Web3(new HttpProvider(new HttpRequestManager('http://localhost:8545', 0.1)));

复制代码

使用回调函数调用rpc

$web3->clientVersion(function ($err, $version) {% `1 i) n8 H9 m! z2 @ X
if ($err !== null) {
# i* f; P4 k4 B
// do something) G, k8 }' }$ I- C
return;5 s: Q0 n0 _2 W/ M4 t7 D
}
/ n) Z ]5 C, Y
if (isset($client)) {2 |- Q ]+ Z4 k4 q
echo 'Client version: ' . $version;
2 V k* E/ S5 f, K
}0 y6 a3 L0 J9 a* \0 n: p
});3 n, }5 ]/ I" [" g) a
eth3 _# l! A2 r" c
use Web3\Web3;4 {- t& H0 ~1 B
$web3 = new Web3('http://localhost:8545');
0 Q* d- V( r; t# k( J
$eth = $web3->eth;. P/ T. [6 I2 a4 K$ l% K. F
这样也行：
- g0 d. p+ S2 c
use Web3\Eth;
' J3 x- m0 y8 ~. g( r! d/ R* D! \9 s
$eth = new Eth('http://localhost:8545');1 |. P5 N, L$ K
net0 ]7 z. F8 O3 J& c2 F5 q
use Web3\Web3;& C$ R/ ^. Q7 L4 A" S3 h" y& F# O" L
$web3 = new Web3('http://localhost:8545');' M1 v9 d! G+ b( J+ C( z, j: B- g
$net = $web3->net;
+ D" V* y+ T' j; M" @4 w9 C+ U
或者
9 H9 j$ n! i) I( l, h
use Web3\Net;/ u0 V7 b+ K, i' `! Q
$net = new Net('http://localhost:8545');
6 y2 W$ ~" p$ X$ G$ _, R' W
batch' A3 {- q* X0 p
web37 b7 e, ?' M1 N9 i/ k& u: ~
$web3->batch(true);
* }9 K) x" a7 X' V, B
$web3->clientVersion();. f6 x5 l/ s; t) ?
$web3->hash('0x1234');0 R" U" }; I) M1 }3 w' ]$ X
$web3->execute(function ($err, $data) {
4 D3 ]$ J5 g% V& p0 j* q8 I
if ($err !== null) {
4 {$ l2 H9 s* `* D4 K# Z8 n4 a m
// do something. u7 q$ h3 I: V6 `2 s9 U+ @. n
// it may throw exception or array of exception depends on error type
% R' a) z7 o9 M: ^
// connection error: throw exception
1 t8 P( P2 ~' }0 G: s
// json rpc error: array of exception
; q& s, L1 [8 k5 S$ V
return;$ [% e! k6 j- p& X$ e1 D& A/ W
}
' B1 f. Q; o: f$ v# @5 b1 P- N' v4 M' O
// do something
" q$ F$ J( t" z9 {$ u- \
});
/ u, c7 ^( m, R0 H( P
eth
$ J0 |( v6 [: a0 m
$eth->batch(true);- R4 x+ z2 x' e, ?+ x7 c0 a
$eth->protocolVersion();
/ H: W' g5 L& e C" ^: X6 i( @
$eth->syncing();
# ~+ o) k% M% S. {0 t$ s8 X
$eth->provider->execute(function ($err, $data) {
/ ^" P! J' N. M/ x
if ($err !== null) {& X, ?+ P. q$ \% R5 b6 n" E
// do something
+ W$ b6 g `( E* {
return;
$ d! u' s: q( w3 {8 n6 F
}- h6 O1 t: q3 n
// do something
( k6 g7 j& `/ |+ H1 N8 l
});( d! ?1 [& B+ S' Y* X- o# E4 B4 D
net
4 J: Z+ `# |$ ~) P: W* b
$net->batch(true);5 _: \$ g- B5 k m, j+ E$ ~
$net->version();
1 h4 F3 J( P* z- |, S
$net->listening();0 V' a' t$ P6 Y$ L' M
$net->provider->execute(function ($err, $data) {
, ~& D, h/ r& w, a- k
if ($err !== null) {
7 {( j( j/ `3 o j5 K/ x. T
// do something, r5 ]6 W6 v4 u7 D7 x8 o1 D8 }3 L
return;
8 M9 }* ?0 E/ m
}3 K5 A. d: ^$ s' K; ]
// do something0 l- x( E2 l: n6 F/ A
});3 o5 G. W3 m: N" f
personal
% O$ Z7 o+ l( \" |; e( [- u$ N6 ~4 z
$personal->batch(true);
9 z7 O& Y$ q M& X8 `/ L9 m
$personal->listAccounts();
$ p& _( p5 q9 Z- h
$personal->newAccount('123456');- |! w! N F- ^9 n$ ?' Z7 Y
$personal->provider->execute(function ($err, $data) {6 u" T2 q5 g u% N# z
if ($err !== null) {' v2 l' N7 Y% X3 k/ S. E# J
// do something
4 Y- Z- M: R3 s. r+ f
return;
8 L3 b' t; ]# T8 n
}
$ A, ?; v0 N) {7 ], l6 K1 V
// do something
" n3 U/ @9 ^% a/ I7 w
});- }7 ]1 z5 }4 T! e; g) u
智能合约Contract8 \" z+ t" O$ N0 a- ^. _0 A
use Web3\Contract;6 m4 U1 W9 F4 [3 ~8 \9 Z2 X9 O& F
$contract = new Contract('http://localhost:8545', $abi);5 \0 E7 n4 f! h% D
// deploy contract
; x: w; p1 y7 J. T4 l
$contract->bytecode($bytecode)->new($params, $callback);% A3 z4 r7 T2 m; o- L6 l
// call contract function
5 K8 ]# u/ L1 V9 _
$contract->at($contractAddress)->call($functionName, $params, $callback);# _7 M0 Y: Q& a8 c. \2 I
// change function state/ H+ V( P U2 U: j. B1 y/ T! ]4 b/ E
$contract->at($contractAddress)->send($functionName, $params, $callback);
$ f% T, C/ k& V6 u5 C
// estimate deploy contract gas
: S6 T6 \( D1 X: I- p# k4 ]4 I8 d
$contract->bytecode($bytecode)->estimateGas($params, $callback);" D+ U l! A6 k. f: X
// estimate function gas
" m6 g" Z1 m/ ?2 I( c9 ?
$contract->at($contractAddress)->estimateGas($functionName, $params, $callback);
8 \. s( }0 v& O7 G* s+ _
// get constructor data* }+ `4 A& K$ f6 z
$constructorData = $contract->bytecode($bytecode)->getData($params);7 C5 o! z2 \" P- |* @; n
// get function data0 O& s+ v8 `3 T
$functionData = $contract->at($contractAddress)->getData($functionName, $params);
1 a. l: V8 C+ E! W0 ?5 g3 n
将值分配给外部域（从回调域到域外）
3 u" @; L4 ?) o* U
由于和JavaScript回调不同，如果需要将值赋值到域外，我们需要给回调赋值。
3 X5 y/ A% r, _7 z
$newAccount = '';
! }- i, k7 ^# e1 w
$web3->personal->newAccount('123456', function ($err, $account) use (&$newAccount) {6 d4 R2 \' t. D( V w- A
if ($err !== null) {
0 M) `: x- X: b
echo 'Error: ' . $err->getMessage();
- e% J9 Y f* J+ Z
return;
4 y, N2 ]# a8 T/ s9 |
}* m+ ?# y# ]8 X, V( G' f5 m" Z
$newAccount = $account;. P y, G* e; s; H& l
echo 'New account: ' . $account . PHP_EOL;, K6 w. d& H- w8 G
});

复制代码

php以太坊，主要是介绍使用php进行智能合约开发交互，进行账号创建、交易、转账、代币开发以及过滤器和事件等内容。