Questions tagged [php]
Questions regarding the use of the PHP scripting language with Ethereum.
59
questions
0
votes
0answers
14 views
Need to access/send to Ethereum wallet on web page
I'm looking for a good, simple, effective PHP toolkit to access Ethereum wallets. I am designing a page where participants can contribute Ethereum towards a final goal. I want the page to not just say ...
2
votes
1answer
160 views
How can I do abi.encodePacked in Python or PHP?
Just concatenating strings doesn't work.
Keccak::hash(10 . $address, 256) is what I'm doing atm.
1
vote
1answer
273 views
How can I sign a message off-chain and verify it in the contract method that it was signed by a specific address?
I have a public / private keys. I release a contract with these keys. I want some user to withdraw a token / ether, so I sign some message like {withdraw: 10, nonce:1} offchain. User uses this signed ...
0
votes
1answer
42 views
Can we use both centralized and decentralized approach for developing DAPP?
I saw a dapp using Decentralized approach for the buying and selling ERC20 Tokens ..But there's no proof of using the functions defined in smart contract in the web3js library.How is that possible ?.....
1
vote
1answer
196 views
Why does some of the DAPP uses PHP and how would they do so?
I always wonder how come many DAPPS uses PHP extension at the end of the filename and how did they do so ?? There is slighlty possibility that they are using the Web3PHP library to interact with the ...
0
votes
0answers
53 views
infura return null when eth_getTransactionReceipt
I am trying to send some test ether on Rinkeby network using Infura, Im using some php library to make it.
<?php
use Web3p\EthereumTx\Transaction;
use Web3\Web3;
$valueSend = dechex(0.1 * 10**18);
...
0
votes
0answers
215 views
cURL error [0]: Failed to connect to 127.0.0.1 port 8545: Connection refused
I am using laravel for transfer erc20 token, but get this error. Here is my example code
// Instantiate Ethereum RPC lib with your server credentials (i.e. Ethereum-Go)
// This example assumes ...
3
votes
2answers
101 views
Create signed message without JSON RPC node in PHP
I am trying to recreate effect of web3's eth.accounts.sign in PHP and I struggle to find good resources how to do it properly.
I have seen this
(found it thanks to this thread) and based on what I ...
0
votes
0answers
611 views
Web3 library to use with Laravel [duplicate]
Is there some library like web3.js or ethers.js but in PHP to use with Laravel?
(Which code is hopefully maintained)
Or is PHP just the strongest choice possible I want to work with web3?
0
votes
0answers
61 views
eth_sendTransaction gas required exceeds allowance
$result = $client->callMethod('eth_sendTransaction', [array(
"from" => $address->address,
"to" => "0xac52822dde76b9c4cd701d5f4402acedb2a86cc1",
...
2
votes
0answers
88 views
ethereum-php library SmartContract balanceOf always returns 0
I am trying to check balance of some USDT token using ethereum-php library but it always return 0.
Here is the code,
$contractMeta = json_decode('[{"constant":true,"inputs":[],"name":"name","...
1
vote
1answer
413 views
Infura getLogs returns an empty result
I'm writing a crypto based system with PHP on Infura, and now I am coding a script to retrieve logs for a specific address. This is my code:
$ch = curl_init($my_server_url);
$data = array(
'...
0
votes
1answer
59 views
Automate token distribution?
How can I execute a function on a smart contract from a web-app backend? (Laravel / PHP)
My smart contracts holds X tokens.
In my MySQL database, users are owed X tokens. I have their wallet ...
1
vote
1answer
110 views
What are the minimum requirements for Geth server only for API calls?
I want to run a platform based on Ethereum and PHP to let our customers to sell/buy Ethereum based currencies online, and we have not any plan to mine the blockchain. In this regard, please help me to ...
0
votes
0answers
127 views
Geth web3.eth.contract returns null
I understand that the way I'm doing this is a bit backwards, but I cannot install node.js onto our server, and we are using a PHP backend which doesn't have very good Ethereum support.
I am trying to ...
1
vote
2answers
137 views
Testrpc on ubuntu
I have a .php website on my ubuntu virtual machine. I want to start the testrpc in this machine, so I can interract with my smartcontract with this web interface. Is this possible?
0
votes
1answer
103 views
Sending ETH or Tokens from the command line to be integrated in a PHP script
I'm relatively new to using ETH on the command line. Do I use Geth or Parity? All I want to do is be able to send some ETH or Tokens from my eth private key. Which way is the best way to do it? I plan ...
1
vote
1answer
121 views
Initiate transaction from server to smart contract
In my case, i have an API written in PHP which periodically checks the database. If certain condition was met, i need to send an alert message from the API to an account/node in the Ethereum ...
1
vote
1answer
475 views
Ethereum Transaction Using cUrl and web3.php, I get a Receipt but the Transaction is not sent to the Network
This has been doing my head in all day, after wading through and managing to get all my values converted to hex I create and sign the ethereum transaction using the web3p/ethereum-tx library from ...
1
vote
1answer
151 views
My web3.php installation question
How can I install web3.php? Can I use shared hosting to run it or I must use vps, if I use vps I must use root to install web3.php? Thanks.
1
vote
0answers
850 views
Unable to locate package php5.6-mbstring [closed]
root@iZwz98r5jfsgx41dfymo6iZ:/usr/local/lib# sudo apt-get install php5.6-mbstring
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package ...
1
vote
1answer
897 views
Invalid sender when sending Raw Transaction, signed w/ ethereum-tx on PHP
I am using PHP and ethereum-tx library https://github.com/web3p/ethereum-tx to sign transactions but when trying to send them to the node I got an "invalid sender" error. Besides, exactly the same ...
asked Nov 21 '18 at 12:04
Juan Ignacio Pérez Sacristán
2,9327 gold badges33 silver badges63 bronze badges
2
votes
0answers
58 views
Ethereum js wallet for php
https://github.com/ethereumjs/ethereumjs-wallet
I need this library with the same functions in PHP
Would u give me the link
0
votes
1answer
299 views
how to pass value to contract via php (no java script)?
I wrote a contract that get a unit and do something
My question :
How to pass a value to this contract function via PHP? (not js,py,MetaMask, ... . just in php)
For example, I use this and install ...
0
votes
1answer
400 views
How do I check the Ethereum balance and unique transactions count of a Smart Contract over a period of time?
Basically I want to be able to track smart contracts balance and unique transactions over a period of time such as , last 24hours, last hour and so.
What would be the best approach into doing this? ...
0
votes
1answer
142 views
Unable to Generate Address Endpoint Blockcypher
I am trying to generate an address using Blockcyphers Address Endpoint using cUrl.
- https://api.blockcypher.com/v1/eth/main/addrs?token=eth
But it returns this error - "Endpoint not found. Please ...
0
votes
1answer
153 views
getting result of a method of smart contract that don't change any state variables
I know in ethereum if a method of smart contract don't change state variables we can see it's result without making any transaction.
now I want to know how can see result of this method ...
1
vote
1answer
298 views
Recovered Sender Address from Raw Transaction
I'm trying this code example : https://thomasclowes.com/verifying-an-ethereum-signature-on-the-server-php-2/
Expected $recoveredSenderAddress = 0xd5bfc359c3a377bb8afd41db8ffc8d1349718233
Actual $...
1
vote
1answer
428 views
generating raw trx and sending it to the network shows “invalid sender” error
I'm trying to make an ethereum raw transaction by php and these libraries:
https://github.com/simplito/elliptic-php
https://github.com/kornrunner/php-keccak
https://github.com/web3p/rlp
this is my ...
1
vote
0answers
118 views
Any easy php script to sign and send transactions maybe run contract also
Thanks I have JavaScript version but not php version especially for sign and send transaction
2
votes
2answers
6k views
How to fetch ETH/USD price from the coinmarketcap api
I want to fetch the current ETH-USD price from this api (https://api.coinmarketcap.com/v1/ticker/ethereum/?convert=USD). How do I fetch just the price into a variable in PHP for reuse on my ...
1
vote
0answers
887 views
How to transfer tokens from smart contract using PHP?
I want to transfer tokens using PHP script and that script will be executed using cronjob, is there library available to transfer by unlocking account using private key?
0
votes
1answer
146 views
Ethereum-PHP How to receive outbound parameters from smart contract function
In contract sol file I have function definition:
function product(uint32 _prdId) public view
returns (uint32 prdId, string prdName, address prd, uint closeTime,
uint promoTime,uint8 bonus, ...
2
votes
1answer
1k views
Ethereum-PHP Calling contract function with parameter
I'm not the author of Ethereum part but have to connect to using php. Choosen Ethereum-PHP package (https://github.com/digitaldonkey/ethereum-php). Have connection to ethereum and smart contract but ...
3
votes
1answer
919 views
Ethereum address genеration and keccаk256
I'm trying to generate eth address on PHP. Having issue with keccak256.
I'm using this class: https://github.com/kornrunner/php-keccak
It works good, I checked many times on https://emn178.github.io/...
0
votes
2answers
822 views
How to make an action to send record to my database?
I want all transaction of the tokens send to my database through smart contract.
For example, A send 10Token to B, it will show on blockchain, but I also want a function which smart contract will let ...
1
vote
1answer
818 views
Failed RLPx handshake
I am trying to use https://github.com/kesar/ethereum-php on the back-end of my web site.
I followed a tutorial http://iotbl.blogspot.ca/2017/03/setting-up-private-ethereum-testnet.html to set up two ...
1
vote
1answer
233 views
Dapp fundamental q about listening solidity events
Sol:
I created contract with events that are raised when is called some function.
Html fo:
Those functions are called via web3.js with abi and address - easy.
Backend (no js) asp or php:
I am not ...
1
vote
2answers
5k views
How to transfer ETH between two addresses using geth and json rpc
I have geth running on my server. I am building a php website which act as wallet. Now iam able to create addresses.
I need to be able to deposit and withdraw ETH between addresses on same node. I ...
1
vote
1answer
2k views
Interact with MetaMask via PHP
I can easily interact with metamask via web3 js like this (JS):
web3 = new Web3(web3.currentProvider);
Is it possible to interact with metamask via php? For example (PHP):
$ethereum = new Ethereum('...
1
vote
2answers
693 views
Why doesn't my verification of a signed message signature work in PHP?
I am attempting to verify a signed message in PHP.
To be clear, I am not looking to interface with JSON-RPC or any external service, which I both a) know works and b) successfully verifies the ...
0
votes
1answer
727 views
Automating Listing Addresses and Balances Using PHP
I want to incorporate a javascript in php that list all the accounts and shows balances for those. This is my script for that:
<script language="javascript">
function checkAllBalances() {
var ...
1
vote
1answer
2k views
Generate Ethereum address in PHP?
I am working on a web application where I need to generate Ethereum addresses in PHP, how do i go about generating a random Ethereum public/private key pair in PHP?
thanks.
0
votes
1answer
2k views
Is there a way to read data from smart contract using PHP?
I have a smart contract. All what I need is to make a PHP script that will get some public data from smart contract using it's address. How can I do that? Maybe there is some libraries?
2
votes
1answer
2k views
Generate Ethereum address from a private key
My question was first asked on stackoverflow but due lack of privileges I couldn't move it here directly.
I am trying to generate an Ethereum address based on a given private key following this "How ...
2
votes
2answers
2k views
web3 js eth.contract equivalent in PHP
var Web3 = require('web3');
var web3 = new Web3();
web3.setProvider(new web3.providers.HttpProvider("http://blahblah.com:8545"));
var token = web3.eth.contract(ABI).at("x0x_contract_address")
How ...
1
vote
0answers
381 views
Can't connect to RPC on php server
I am using php to connect RPC server. In localhost, everything works fine. I moved my files to host to test and I realised that $geth->Method_Name() is not working.
If I print_r($geth), here is the ...
1
vote
0answers
63 views
I want to create a local exchange site how to add ethereum? [closed]
like a said I want to build an exchange site how can I add ethereum on it?
8
votes
3answers
9k views
web3 js php implementation
Is there any way to communicate with ethereum through php ? what i want is to get Smart contract details from contract address like Contract token name, decimal, abi, balance, tokens supply symbols ...
1
vote
1answer
1k views
Save hash data with KECCAK-256 then reverse the process in PHP
I am saving data hashed with keccak-256 in Solidity and I am trying read that data with PHP, but cant seem to find any good solutions.
I can get PHP to read off the data but I cant arrive at the same ...
