Google Mail in PHP

  1 <?php
  3 include_once "templates/base.php";
  4 session_start();
  5 
  6 require_once realpath(dirname(__FILE__)).‘/../src/Google/autoload.php‘;
  8 $client_id     = "xxxxxx";
  9 $client_secret = "xxxxxx";
 10 $client_uri    = "http://localhost/405/gmail/example/Email.php";
 12 /************************************************
 13   Make an API request on behalf of a user. In this case we need to have a valid OAuth 2.0 token for the user, so we need to send them
 16   through a login flow. To do this we need some information from our API console project.
 18  ************************************************/
 19 $client = new Google_Client();
 20 $client->setClientId($client_id);
 21 $client->setClientSecret($client_secret);
 22 $client->setRedirectUri($client_uri);
 23 $client->addScope("https://mail.google.com/"); // change to calendar scope if you are using calendar api
 24 /************************************************
 25   When we create the service here, we pass the client to it. The client then queries the service for the required scopes, and uses that when
 28   generating the authentication URL later.
 29  ************************************************/
 30 $gmail_service = new Google_Service_Gmail($client);    //1.create google_service_gmail
 31 /************************************************
 32   If we‘re logging out we just need to clear our local access token in this case
 34  ************************************************/
 35 if (isset($_REQUEST[‘logout‘])) {
 36   unset($_SESSION[‘access_token‘]);
 37 } 
 39 /************************************************
 40   If we have a code back from the OAuth 2.0 flow, we need to exchange that with the authenticate() function. 
　　　 We store the resultant access token bundle in the session, and redirect to ourself.
 41  ************************************************/
 42 if (isset($_GET[‘code‘])) {      // 4. After we login or verify sucuessly. we got a code back from OAuth 2.0
 43   $client->authenticate($_GET[‘code‘]);
 44   $_SESSION[‘access_token‘] = $client->getAccessToken();
 45   $redirect = ‘http://‘ . $_SERVER[‘HTTP_HOST‘] . $_SERVER[‘PHP_SELF‘];
 46   header(‘Location: ‘ . filter_var($redirect, FILTER_SANITIZE_URL));  //5. After getting token and setting token,redirect to self
 47 }
 49 /************************************************
 50   If we have an access token, we can make requests, else we generate an authentication URL.
 52  ************************************************/
 53 if (isset($_SESSION[‘access_token‘]) && $_SESSION[‘access_token‘]) {
 54   $client->setAccessToken($_SESSION[‘access_token‘]);   //6. setting the token every time if we have access_token; otherwise, we need to retrieve the token as this token is very important to verity the user.
 55 } else {
 56   $authUrl = $client->createAuthUrl();    //2. to createAuthUrl();
 57 }
 59 /************************************************
 60   If we‘re signed in and have a request to shorten a URL, then we create a new URL object, set the  unshortened URL, and call the ‘insert‘ method on the ‘url‘ resource. Note that we re-store the access_token bundle, just in case anything
 61   changed during the request - the main thing that might happen here is the access token itself is  refreshed if the application has offline access.
 62  ************************************************/
 63 if ($client->getAccessToken() && isset($_GET[‘url‘])) {  //7. to check accessToke; we have a request to shorten a URL if signed in.
 64   $url = new Google_Service_Urlshortener_Url();
 65   $url->longUrl = $_GET[‘url‘];
 66   $short = $service->url->insert($url);
 67   $_SESSION[‘access_token‘] = $client->getAccessToken();
 68 }
 70 echo pageHeader("Getting Gmail");
 71 ?>
 72 <div class="box" style="width:800px;">
 73   <div class="request">
 74 <?php 
 75 if (isset($authUrl)) {
 76   echo "<a class=‘login‘ href=‘" . $authUrl . "‘>Connect Me!</a>";   // 3. Go to gmail to login or verify.  
 77 } else {
 79     $mail_list = listMessages($gmail_service, "me");  //8.Go to retrieve mail by "me" theme
 80   echo "<a class=‘logout‘ href=‘?logout‘>Logout</a>";
 81 }
 82 ?>
 83   </div>
 85   <div class="mail_list" >
 86 <?php
 88 if (isset($mail_list)) {
 90     $cnt=1;
 91     //$num is the number to display how many incoming email.
 92     $num = 10;
 93   foreach($mail_list as $each_mail) {
 94        echo "$cnt";
 95       if($cnt<=$num){
 96         $message = getMessage($gmail_service, ‘me‘, $each_mail[‘id‘]); // 10.
 99         echo "<pre>";
100        // print_r($message);
101         echo "</pre>";
104         $mail_payload = $message->getPayload();
105         $mail_parts = $mail_payload->getParts();
107         $mail_headers = $mail_payload->getHeaders();   
110         //extract headers in mail (to, from, subject, etc.)
111 //        echo "<pre>";
112 //        var_dump($mail_headers);
113 //        echo "</pre>"; 
116         $mail_body_raw = $mail_payload[‘modelData‘][‘parts‘][0][‘modelData‘][‘body‘][‘data‘]; //11.
118         $mail_body = base64_decode($mail_body_raw);  //12.
119         $mail_body = str_replace("\n", "<br/>", $mail_body);
120         echo $mail_body;
122       }
123       $cnt++;
124   }
128  }
129 ?>
130   </div>
131 </div>
132 <?php
133 //echo pageFooter(__FILE__);
135 /**
136  * Get list of Messages in user‘s mailbox.138  * @param  Google_Service_Gmail $service Authorized Gmail API instance.
139  * @param  string $userId User‘s email address. The special value ‘me‘ can be used to indicate the authenticated user.
141  * @return array Array of Messages.
142  */
143 function listMessages($service, $userId) {
144   $pageToken = NULL;
145   $messages = array();
146   $opt_param = array();
147   do {
148     try {
149       if ($pageToken) {
150         $opt_param[‘pageToken‘] = $pageToken;
151       }
152       $messagesResponse = $service->users_messages->listUsersMessages($userId, $opt_param);  //9.
153       if ($messagesResponse->getMessages()) {
154         $messages = array_merge($messages, $messagesResponse->getMessages());
155         $pageToken = $messagesResponse->getNextPageToken();
156       }
157     } catch (Exception $e) {
158       print ‘An error occurred: ‘ . $e->getMessage();
159     }
160   } while ($pageToken);
162   foreach ($messages as $message) {
163 //    print ‘Message with ID: ‘ . $message->getId() . ‘<br/>‘;
164   }
166   return $messages;
167 }
169 /**
170  * Get Message with given ID.172  * @param  Google_Service_Gmail $service Authorized Gmail API instance.
173  * @param  string $userId User‘s email address. The special value ‘me‘can be used to indicate the authenticated user.
175  * @param  string $messageId ID of Message to get.
176  * @return Google_Service_Gmail_Message Message retrieved.
177  */
178 function getMessage($service, $userId, $messageId) {
179   try {
180     $message = $service->users_messages->get($userId, $messageId);
181 //    print ‘Message with ID: ‘ . $message->getId() . ‘ retrieved.‘;
182     return $message;
183   } catch (Exception $e) {
184     print ‘An error occurred: ‘ . $e->getMessage();
185   }
186 }
190 /**
191  * Send Message.193  * @param  Google_Service_Gmail $service Authorized Gmail API instance.
194  * @param  string $userId User‘s email address. The special value ‘me‘ can be used to indicate the authenticated user.
196  * @param  Google_Service_Gmail_Message $message Message to send.
197  * @return Google_Service_Gmail_Message sent Message.
198  */
199 function sendMessage($service, $userId, $message) {
200   try {
201     $message = $service->users_messages->send($userId, $message);
202     print ‘Message with ID: ‘ . $message->getId() . ‘ sent.‘;
203     return $message;
204   } catch (Exception $e) {
205     print ‘An error occurred: ‘ . $e->getMessage();
206   }
207 }