Introduction to Sina Weibo API Development - PHP Basics - User Authorization_PHP Tutorial

Nowadays, more and more people are playing Weibo, and there are more and more third-party application developments for Weibo. I accidentally came into contact with Sina Weibo API development, Sina Weibo API There are many development resources. Sina Weibo provides a platform for developers. The website address is: http://open.weibo.com. It contains comprehensive information on Sina Weibo development, including the use and introduction of developers. , API function introduction documents in various languages, SDK and other materials.

In the process of development and learning, I feel that although it is not too difficult, there are still some problems that need our attention. Today, in the process of development and learning, I simply used PHP to conduct Sina Weibo The content of API development is organized and explained,

Preparatory work before Sina Weibo API development

First go to Sina Weibo open platform to download the PHP-based SDK development package. The download address is: http://code.google.com/p/libweibo/downloads/detail?name=weibo-oauth-class-with- image-avatar-06-29.zip

After downloading, place it in your own development environment and unzip it. It also contains a demo program. We can refer to its sample program to write.

The most important user authorization process in Sina Weibo API development

In fact, many problems during the development process focus on the user authorization stage. The third-party applications I developed use OAuth authorization. The OAuth authorization process is very clear and complete in the Sina Weibo open platform. For introduction, we can go to http://open.weibo.com/wiki/Oauth to view it. I will introduce and explain it here from the perspective of example development.

　1. First obtain the unauthorized Request Token

$o = new WeiboOAuth( WB_AKEY , WB_SKEY  );
$keys = $o->getRequestToken();
//echo($keys['oauth_token'].' : '.$keys['oauth_token_secret']);

We need to register an account in the Sina Weibo open platform, or log in directly with our Sina Weibo account, enter My Applications, and then follow the prompts to create our own third-party application. After the creation is completed, we can get Two authorized App Key and App Secret values, these two values ​​are the key to our application development.

After getting the authorization value, we can use the above code to obtain the unauthorized Request Token value, and they will be stored in the $key array variable.

　　2. Then request the user to authorize Token

$_SESSION['keys'] = $keys;
$aurl = $o->getAuthorizeURL( $keys['oauth_token'] ,false , 'http://localhost/callback.php');

After getting the unauthorized Request Token value, we can use the above code to start preparing to go to the Sina Weibo authorization page for authorization. $aurl is the authorization link page. After we get $aurl, we can use header() to jump directly Go to the authorization page, and then the user enters the Sina Weibo account and password for authorization. After the authorization is completed, it will automatically jump back to the callback page you set in the last parameter: http://localhost/callback.php. You can use this link Set it to the previous page so that it will automatically jump back after the authorization is completed.

It should be noted that it is necessary to set the value of session keys, which is needed to obtain the authorized Access Token below. Many friends may refer to the instructions on the open platform for authorization, but they will find that errors always occur. This is usually the problem. You have not set the session keys value. Of course, you cannot get the Access Token value below. This must be remembered.

　3. Access Token finally authorized by the user

$o = new WeiboOAuth( WB_AKEY ,
                     WB_SKEY ,
                     $_SESSION['keys']['oauth_token'] ,
                     $_SESSION['keys']['oauth_token_secret']  );

$last_key = $o->getAccessToken(  $_REQUEST['oauth_verifier'] ) ;
echo($last_key['oauth_token']);

$o = new WeiboOAuth( WB_AKEY ,
                                                                                                                                                WB_SKEY $_SESSION['keys']['oauth_token'] ,
                         $_SESSION['keys']['oauth_token_secret'] );

$last_key = $o->getAccessToken( $_REQUEST['oauth_verifier'] ) ;
echo($last_key['oauth_token']);

The above code finally obtains the Access Token authorized by the user. There are two values ​​in total. They are stored in the $last_key array variable. We can also see that the next two parameters are the session values ​​we set earlier. This is basically complete. This is a complete process of Sina Weibo user authorization.

Work after authorization is completed

After the authorization is completed, we can start to call the various API function interfaces provided by Sina Weibo to develop practical applications. Here I will give a brief explanation of the interface for getting the latest Weibo records. Everything else is similar.

The API interface function to obtain the latest Sina Weibo information is: public_timeline(). See the sample code below:

//获取前20条最新更新的公共微博消息
$c = new WeiboClient( WB_AKEY ,
                      WB_SKEY ,
                      $oauth_token ,
                      $oauth_token_secret  );

$msg  = $c->public_timeline();
if ($msg === false || $msg === null){
 echo "Error occured";
 return false;
}
if (isset($msg['error_code']) && isset($msg['error'])){
 echo ('Error_code: '.$msg['error_code'].';  Error: '.$msg['error'] );
 return false;
}
print_r($msg);

//Get the first 20 latest updated public Weibo messages
$c = new WeiboClient( WB_AKEY ,
                                                                                                                                                      WB_SKEY                            $oauth_token ,
                                 $oauth_token_secret ); $msg = $c->public_timeline();
if ($msg === false || $msg === null){
echo "Error occured";
return false;
}
if (isset($msg['error_code']) && isset($msg['error'])){
echo ('Error_code: '.$msg['error_code'].'; Error: '.$msg['error'] );
return false;
}
print_r($msg);

Usually after we obtain the Access Token values ​​authorized by the user, we save them in our user table and correspond to the accounts in our application. After that, we do not need to call the Sina Weibo API interface every time. I've been certified every time.

The above code is very simple. Instantiate the WeiboClient object and then directly call the interface function public_timeline to get the returned information, if there is no error. Usually the data format returned by the Sina Weibo API interface is generally Json format or XML format, and we are using PHP for development here, so using Json format data has inherent advantages. If Json format data is returned, use PHP directly. The function json_decode() can be converted into the array format commonly used in PHP.

Source: Red Heart Grass Blog

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