Content for getting-started-in-php.md and send-xrp.md

content/_code-samples/send-xrp/php/composer.json

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+{
+  "require": {
+    "hardcastle/xrpl_php": "^0.8.5"
+  }
+}

content/_code-samples/send-xrp/php/send-xrp.php

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+<?php
+
+// Use the Composer autoloader
+require __DIR__ . '/vendor/autoload.php';
+
+// Imports
+use XRPL_PHP\Client\JsonRpcClient;
+use XRPL_PHP\Models\Account\AccountInfoRequest;
+use XRPL_PHP\Wallet\Wallet;
+use function XRPL_PHP\Sugar\fundWallet;
+use function XRPL_PHP\Sugar\xrpToDrops;
+
+// Example credentials
+$wallet = Wallet::fromSeed("sEd7zwWAu7vXMCBkkzokJHEXiKw2B2s");
+print_r('Wallet Address: ' . $wallet->getAddress() .PHP_EOL); // rMCcNuTcajgw7YTgBy1sys3b89QqjUrMpH
+
+// Create a client using the Testnet
+$client = new JsonRpcClient("https://s.altnet.rippletest.net:51234");
+
+// Transaction definition
+$paymentTx = [
+    "TransactionType" => "Payment",
+    "Account" => $wallet->getAddress(),
+    "Amount" => xrpToDrops('50'),
+    "Destination" => "rfmMDuKPsXUgpkCvJeS132wtfXWujjHqiW",
+    "DestinationTag" => 12345
+];
+
+// Autofill mandatory values like Sequence, Fee and LastLedgerSequence
+$preparedTx = $client->autofill($paymentTx);
+print_r("Prepared tx: " . PHP_EOL);
+print_r($preparedTx);
+
+// Sign prepared transaction
+$signedTx = $wallet->sign($preparedTx);
+print_r("Identifying hash: " . $signedTx['hash'] . PHP_EOL);
+print_r("Signed blob: " . $signedTx['tx_blob'] . PHP_EOL);
+
+ // Submit signed blob and wait for validation
+$txResponse = $client->submitAndWait($signedTx['tx_blob']);
+
+// Wait for validation
+// submitAndWait() handles this automatically, but it can take 4-7s.
+
+// Check transaction results
+$result = $txResponse->getResult();
+print_r("Transaction result:" . $result['meta']['TransactionResult'] . PHP_EOL);
+
+print_r("You can check wallets/accounts and transactions on https://test.bithomp.com"  . PHP_EOL . PHP_EOL);