# PHP

### Overview

The **Circular Enterprise APIs** provide a powerful and efficient way to **certify data on the blockchain**, ensuring immutability, transparency, and security. These APIs facilitate **account management, network configuration, data signing, and transaction monitoring**, making it easier for enterprises to integrate blockchain-based certification into their workflows.

This library is designed for developers who need to verify, sign, and submit **data certificates** using the **Circular blockchain** while maintaining seamless integration with **PHP applications**.

### Installation

You can install the **Circular Enterprise APIs** via **npm**:

```bash
composer require circularprotocol/circular-enterprise-apis
```

### Usage example

```php
<?php

require_once __DIR__ . "/vendor/autoload.php"; // IF NEEDED
require_once __DIR__ . "/src/CircularEnterpriseAPIS-php"; // IF NEEDED

use Circularprotocol\Circularenterpriseapis\CEP_Account;

try {
    // Instantiate the CEP Account class
    $account = new CEP_Account();
    echo "CEP_Account instantiated successfully.\n";

    $address = "your-account-address";
    $pk = "your-private-key"; // Note: pk should be a string, not a hex literal
    $blockchain = "blockchain-address"; // Same here, string.
    $txID = ""; // Initialize txID
    $txBlock = ""; // Initialize txBlock

    $account->setNetwork("testnet"); // chose between multiple networks such as testnet, devnet and mainnet
    $account->setBlockchain($blockchain);
    echo "Test variables set.\n";

    if ($account->open($address)) {
        echo "Account opened successfully.\n";

        if ($account->updateAccount()) {
            echo "Nonce: " . $account->Nonce . "\n";

            $txIDTemp = $account->submitCertificate(
                "your-data-to-certificate",
                "1de4fc4d951349a382c9ca58e6c82feeed8a233657683455080338675ad7e61f"
            );
            if ($txIDTemp["Result"] == 200) {
                $txID = $txIDTemp["Response"]["TxID"];
                echo "TxID: " . $txID . "\n";

                $resp = $account->getTransactionOutcome($txID, 10);
                if ($resp["BlockID"]) {
                    $blockID = $resp["BlockID"];
                    $status = $account->getTransaction($blockID, $txID);

                    if ($status == 200) {
                        echo "Transaction Status: " .
                            $status["Response"]["Status"] .
                            "\n";

                        $account->close();
                    } else {
                        echo "Error on retrieving transaction";
                    }
                } else {
                    echo "Error on retrieving transaction status";
                }
            } else {
                echo "Certificate submission error";
            }
        } else {
            echo "Update Account Error: " . $account->lastError . "\n";
        }
    } else {
        echo "Failed to open account: " . $account->lastError . "\n";
    }
} catch (Exception $e) {
    echo "An error occurred: " . $e->getMessage() . "\n";
}

?>
```

### Useful Links

You can find more on the [official GitHub repository](https://github.com/circular-protocol/PHP-Enterprise-APIs) or on the [official Packagist repository](https://packagist.org/packages/circularprotocol/circular-enterprise-apis).