QQ登录OAuth2.0 php接入类

 

/**
 *
 * qq登录
 * @author http://www.heui.org
 *
 */
class Oauth_qq
{
  private static $_instance ;
  private $config = array ();

  private function __construct( $config )
  {
    $this ->Oauth_qq( $config );
  }

  public static function getInstance( $config )
  {
    if (!isset(self:: $_instance ))
    {
      $c = __CLASS__ ;
      self:: $_instance = new $c ( $config );
    }
    return self:: $_instance ;
  }

  private function Oauth_qq( $config )
  {
    $this ->config = $config ;
    $_SESSION [ "appid" ]    = $this ->config[ 'appid' ];
    $_SESSION [ "appkey" ]   = $this ->config[ 'appkey' ];
    $_SESSION [ "callback" ] = $this ->config[ 'callback' ];
    $_SESSION [ "scope" ] = "get_user_info,add_share,list_album,add_album,upload_pic,add_topic,add_one_blog,add_weibo" ;
  }

  function login()
  {
    $_SESSION [ 'state' ] = md5(uniqid(rand(), TRUE)); //CSRF protection
    $login_url = "https://graph.qq.com/oauth2.0/authorize?response_type=code&client_id= "
    . $_SESSION [ "appid" ] . "&redirect_uri=" . urlencode( $_SESSION [ "callback" ])
    . "&state=" . $_SESSION [ 'state' ]
    . "&scope=" . $_SESSION [ "scope" ];
    header( "Location:$login_url" );
  }

  function callback()
  {
    if ( $_REQUEST [ 'state' ] == $_SESSION [ 'state' ]) //csrf
    {
      $token_url = "https://graph.qq.com/oauth2.0/token?grant_type=authorization_code& "
      . "client_id=" . $_SESSION [ "appid" ]. "&redirect_uri=" . urlencode( $_SESSION [ "callback" ])
      . "&client_secret=" . $_SESSION [ "appkey" ]. "&code=" . $_REQUEST [ "code" ];

      $response = get_url_contents( $token_url );
      if ( strpos ( $response , "callback" ) !== false)
      {
        $lpos = strpos ( $response , "(" );
        $rpos = strrpos ( $response , ")" );
        $response   = substr ( $response , $lpos + 1, $rpos - $lpos -1);
        $msg = json_decode( $response );
        if (isset( $msg ->error))
        {
          echo "<h3>error:</h3>" . $msg ->error;
          echo "<h3>msg  :</h3>" . $msg ->error_description;
          exit ;
        }
      }

      $params = array ();
      parse_str ( $response , $params );

      $_SESSION [ "access_token" ] = $params [ "access_token" ];
    }
    else
    {
      echo ( "The state does not match. You may be a victim of CSRF." );
    }
  }

  function get_openid()
  {
    $graph_url = "https://graph.qq.com/oauth2.0/me?access_token= "
    . $_SESSION [ 'access_token' ];

    $str   = get_url_contents( $graph_url );
    if ( strpos ( $str , "callback" ) !== false)
    {
      $lpos = strpos ( $str , "(" );
      $rpos = strrpos ( $str , ")" );
      $str   = substr ( $str , $lpos + 1, $rpos - $lpos -1);
    }

    $user = json_decode( $str );
    if (isset( $user ->error))
    {
      echo "<h3>error:</h3>" . $user ->error;
      echo "<h3>msg  :</h3>" . $user ->error_description;
      exit ;
    }

    //set openid to session
    return $_SESSION [ "openid" ] = $user ->openid;
  }

  function get_user_info()
  {
    $get_user_info = "https://graph.qq.com/user/get_user_info? "
    . "access_token=" . $_SESSION [ 'access_token' ]
    . "&oauth_consumer_key=" . $_SESSION [ "appid" ]
    . "&openid=" . $_SESSION [ "openid" ]
    . "&format=json" ;

    $info = get_url_contents( $get_user_info );
    $arr = json_decode( $info , true);

    return $arr ;
  }

  public function __clone()
  {
    trigger_error( 'Clone is not allow' ,E_USER_ERROR);
  }

}

/* 公用函数 */
if (!function_exists( "do_post" ))
{
  function do_post( $url , $data )
  {
    $ch = curl_init();
    curl_setopt( $ch , CURLOPT_RETURNTRANSFER, TRUE);
    curl_setopt( $ch , CURLOPT_POST, TRUE);
    curl_setopt( $ch , CURLOPT_POSTFIELDS, $data );
    curl_setopt( $ch , CURLOPT_URL, $url );
    $ret = curl_exec( $ch );

    curl_close( $ch );
    return $ret ;
  }
}
if (!function_exists( "get_url_contents" ))
{
  function get_url_contents( $url )
  {
    if ( ini_get ( "allow_url_fopen" ) == "1" )
    return file_get_contents ( $url );

    $ch = curl_init();
    curl_setopt( $ch , CURLOPT_RETURNTRANSFER, TRUE);
    curl_setopt( $ch , CURLOPT_URL, $url );
    $result =  curl_exec( $ch );
    curl_close( $ch );

    return $result ;
  }
}

使用实例：

$config [ 'appid' ]    = '' ;
$config [ 'appkey' ]   = '' ;
$config [ 'callback' ] = '' ;
$o_qq = Oauth_qq::getInstance( $config );

//then
$o_qq ->login();
//or
$o_qq ->callback();
$o_qq ->get_openid();
$o_qq ->get_user_info();