curl.php

<?php

class Curl {
  const HEAD = 'POST';
  const GET = 'GET';
  const POST = 'POST';
  const PUT = 'PUT';
  const DELETE = 'DELETE';
  const LOCK = 'LOCK';
  const UNLOCK = 'UNLOCK';

  private $curl_handle;
  private $headers = array();
  private $cookies = array();

  public function __construct( $url = null, $method = null ) {
    $this->curl_handle = curl_init( $url );

    if ( $method ) {
      $this->setMethod( $method );
    }

    return $this;
  }

  public function __destruct() {
    $this->close();
  }

  public function close() {
    curl_close( $this->curl_handle );
  }

  public function setMethod( $method ) {
    $method = strtoupper($method);

    $this->setOpt( CURLOPT_HTTPGET, false );  
    $this->setOpt( CURLOPT_POST, false );  
    $this->setOpt( CURLOPT_PUT, false );  

    switch ( $method ) {
      case 'HEAD':
        break;

      case 'GET':
        $this->setOpt( CURLOPT_HTTPGET, true );
        break;        

      case 'POST':
        $this->setOpt( CURLOPT_POST, true );  
        break;

      case 'PUT':
        $this->setOpt( CURLOPT_PUT, false );  
        break;

      default:
        $this->setOpt( CURLOPT_CUSTOMREQUEST, $method );
        break;
    }

    return $this;
  }

  public function setHeader( $header ) {
    $this->headers[] = $header;
  }

  public function setUserAgent( $user_agent_string ) {
    $this->setOpt( CURLOPT_USERAGENT, $user_agent_string );
  }

  public function setPostData( $data ) {
    $this->setOpt( CURLOPT_POSTFIELDS, $data );
    return $this;
  }

  public function addCookie( $cookie ) {
    $this->cookies[] = $cookie;
  }

  public function returnHeader( $value ) {
    $this->setOpt( CURLOPT_HEADER, $value);
    return $this;
  }

  public function exec() {
    if ( count($this->headers) > 0 ) {
      $this->setOpt( CURLOPT_HTTPHEADER, $this->headers );
    }

    $output = curl_exec( $this->curl_handle );
    $info = curl_getinfo( $this->curl_handle );

    return $output;
  }

  public function setOpt( $option, $value ) {
    curl_setopt( $this->curl_handle, $option, $value);
    return $this;
  }

}

request.php

<?php

require_once 'curl.php';

class Request {
  private $curl, $response;

  public function __construct( $curl = null ) {
    if ($curl) {
      $this->curl = $curl;
    }
  }

  static function get( $url ) {
    $curl = new Curl( $url, Curl::GET );
    return new Request( $curl );
  }

  static function post( $url, $data ) {
    $curl = new Curl( $url, Curl::POST );
    $curl->setPostData( $data );

    return new Request( $curl );
  }

  static function put( $url, $data ) {
    $curl = new Curl( $url, Curl::PUT );
    $curl->setPostData( $data );

    return new Request( $curl );
  }

  static function delete( $url ) {
    $curl = new Curl( $url, Curl::DELETE );
    return new Request( $curl );
  }

  static function lock( $url ) {
    $curl = new Curl( $url, Curl::LOCK );
    return new Request( $curl );
  }

  static function unlock( $url ) {
    $curl = new Curl( $url, Curl::UNLOCK );
    return new Request( $curl );
  }

  public function setHeader( $header, $value ) {
    $this->curl->setHeader( $header . ': ' . $value );
  }

  public function setUserAgent( $user_agent_string ) {
    $this->curl->setUserAgent( $user_agent_string );
  }

  public function addCookie( $cookie ) {
    $this->curl->addCookie( $cookie );
  }

  public function setBasicAuth( $user, $password ) {
    $this->curl->setOpt( CURLOPT_USERPWD, "{$user}:{$password}" );
  }

  public function process() {
    $this->curl->setOpt( CURLOPT_SSL_VERIFYPEER, false )
               ->setOpt( CURLOPT_SSL_VERIFYHOST, 2 )
               ->setOpt( CURLOPT_RETURNTRANSFER, true)
               ->setOpt( CURLOPT_HEADER, true);

    $this->response = $this->curl->exec();

    return $this;
  }

  public function setResponse($response) {
    $this->response = $response;
  }

  public function status() {
    $count = preg_match("/^(HTTP.*)/", $this->response, $matches);

    if ($count) {
        return $matches[0];
    }
  }

  public function statusCode() {
    $status = $this->status();
    $count = preg_match("/([\d]{3})/", $this->response, $matches);

    if ($count) {
        return (int) $matches[0];
    }
  }

  public function header($key) {
    $key = addslashes($key);
    $pattern = "/{$key}: (.*)/";
    $count = preg_match($pattern, $this->response, $matches);
    if ($count) {
        return $matches[1];
    }
  }

  public function content() {
    $count = preg_match("/(\<\?xml.*)/s", $this->response, $matches);

    if ($count) {
      return $matches[1];
    }
  }

  public function xml() {
    $content = $this->content();
    return simplexml_load_string( $content );
  }
}