rpc.php

<?php

class Bitcoin {
  // Configuration options
  private $username;
  private $password;
  private $host;
  private $port;
  private $url;

  // Information and debugging
  public $status;
  public $error;
  public $raw_response;
  public $response;

  private $id = 0;

  function __construct($username, $password, $host = 'localhost', $port = 8332, $url = null) {
    $this->username      = $username;
    $this->password      = $password;
    $this->host          = $host;
    $this->port          = $port;
    $this->url           = $url;
  }

  function __call($method, $params) {
    $this->status       = null;
    $this->error        = null;
    $this->raw_response = null;
    $this->response     = null;

    // The ID should be unique for each call
    $this->id++;

    // If no parameters are passed, this will be an empty array
    $params = array_values($params);

    // Build the request, it's ok that params might have any empty array
    $request = json_encode(array(
      'method' => $method,
      'params' => $params,
      'id'     => $this->id
    ));

    // Build the cURL session
    $curl    = curl_init("http://{$this->username}:{$this->password}@{$this->host}:{$this->port}/{$this->url}");
    
    $options = array(
      CURLOPT_CONNECTTIMEOUT => 10,
      CURLOPT_TIMEOUT        => 10,
      CURLOPT_RETURNTRANSFER => TRUE,
      CURLOPT_FOLLOWLOCATION => TRUE,
      CURLOPT_MAXREDIRS      => 10,
      CURLOPT_HTTPHEADER     => array('Content-type: application/json'),
      CURLOPT_POST           => TRUE,
      CURLOPT_POSTFIELDS     => $request
    );

    curl_setopt_array($curl, $options);

    // Execute the request and decode to an array
    $this->raw_response = curl_exec($curl);
    $this->response     = json_decode($this->raw_response, TRUE);

    // If the status is not 200, something is wrong
    $this->status = curl_getinfo($curl, CURLINFO_HTTP_CODE);

    // If there was no error, this will be an empty string
    $curl_error = curl_error($curl);

    curl_close($curl);

    if (!empty($curl_error)) {
      $this->error = $curl_error;
    }

    if ($this->response['error']) {
      // If bitcoind returned an error, put that in $this->error
      $this->error = $this->response['error']['message'];
    } elseif ($this->status != 200) {
      // If bitcoind didn't return a nice error message, we need to make our own
      switch ($this->status) {
        case 400:
          $this->error = 'HTTP_BAD_REQUEST';
          break;
        case 401:
          $this->error = 'HTTP_UNAUTHORIZED';
          break;
        case 403:
          $this->error = 'HTTP_FORBIDDEN';
          break;
        case 404:
          $this->error = 'HTTP_NOT_FOUND';
          break;
      }
    }

    if ($this->error) {
      return FALSE;
    }

    return $this->response['result'];
  }
}