web3 test init samples

verify.php

@@ -0,0 +1,45 @@
+<?php
+
+require_once 'path/to/web3.php/src/Web3/Providers/HttpProvider.php';
+require_once 'path/to/web3.php/src/Web3/RequestManagers/RequestManager.php';
+require_once 'path/to/web3.php/src/Web3/Web3.php';
+require_once 'path/to/web3.php/src/Web3/Eth.php';
+require_once 'path/to/web3.php/src/Web3/Utils.php';
+
+// https://github.com/sc0Vu/web3.php
+// https://github.com/kornrunner/php-keccak
+// https://github.com/web3p/ethereum-util 
+
+// Include the necessary files
+require_once 'path/to/Keccak.php'; // Adjust the path
+require_once 'path/to/Util.php';   // Adjust the path
+
+use kornrunner\Keccak;
+use Web3p\EthereumUtil\Util;
+
+function verifySignature($address, $signature, $message) {
+    $util = new Util();
+    
+    // Hash the message
+    $msgHash = Keccak::hash("\x19Ethereum Signed Message:\n" . strlen($message) . $message, 256);
+    
+    // Recover the public key from the signature
+    $pubKey = $util->recoverPublicKey($msgHash, $signature);
+    
+    // Convert the public key to an Ethereum address
+    $derivedAddress = $util->publicKeyToAddress($pubKey);
+    
+    // Compare the derived address with the given address
+    return strtolower($address) === strtolower($derivedAddress);
+}
+
+// Fetch and decode the JSON POST request
+$data = json_decode(file_get_contents('php://input'), true);
+$account = $data['account'];
+$signature = $data['signature'];
+$message = $data['message'];
+
+$verified = verifySignature($account, $signature, $message);
+
+echo json_encode(['verified' => $verified]);
+