Hey guyz I received many requests from my readers to write tutorial on facebook Group status update so I am going to show you that how you can do update your joined groups. You can joined many groups and update your status on groups to promote your websites or your products on all groups and this is an easy way to promotion.

How to integrate:

To create Facebook application follow instruction on my previous post How to Login with Facebook Graph API in PHP

We need permissions publish_actions, user_groups to run this code on your website. You need to send request to facebook to review your application permission and allow your app for these permissions Read more.

Script contains two folders called src and images with PHP files.

src

– base_facebook.php // Class Get user Information.

– facebook.php // Class Get user Information.

– config.php // Configuration file.

images

index.php // Main index file.

PHP Code

Edit config.php

<?php

$config['callback_url']         =   'CALL BACK URL/?fbTrue=true'; //   /?fbTrue=true allow you to code process section.

//Facebook configuration
$config['App_ID']      =   'Your App ID';
$config['App_Secret']  =   'Your App Secret'; 

?>

First of all we get current user’s joined groups list and display in drop down.

<?php
$graph_url_groups = "https://graph.facebook.com/v2.1/me/groups?access_token=".$_SESSION['token'];
    $groups = json_decode(file_get_contents_curl($graph_url_groups)); // get all groups information from above url.
   
    
    $dropdown = "";
    for($i=0;$i<count($groups->data);$i++)
    {
        $dropdown .= "<option value='".$groups->data[$i]->id."'>".$groups->data[$i]->name."</option>";
    }
?>

Now we have all joined groups list in $dropdown variable.

Posting on Group is simply like we make post on facebook page in our previous tutorial How to post into a Facebook Page with PHP using Graph API below is the code for posting.

Publish Link with Image:

$publish = $facebook->api('/'.$group_id.'/feed', 'post',
            array('access_token' => $_SESSION['token'],
            'message'=> 'Testing',
            'from' => $config['App_ID'],
            'to' => $group_id,
            'caption' => 'PHP Gang',
            'name' => 'PHP Gang',
            'link' => 'https://www.phpgang.com/',
            'picture' => 'https://www.phpgang.com/wp-content/themes/PHPGang_v2/img/logo.png',
            'description' => 'Testing with PHPGang.com Demo'
            ));

Above code post on facebook group a link with image see attached image.

Publish text status only only:

$publish = $facebook->api('/'.$group_id.'/feed', 'post',
        array('access_token' => $_SESSION['token'],'message'=>$_POST['status'] .'   via PHPGang.com Demo',
        'from' => $config['App_ID']
        ));

Above code share only text status on your selected group.

Here is my complete code to get user authentication and post status:

<?php
session_start();
require 'src/config.php';
require 'src/facebook.php';
// Create our Application instance (replace this with your appId and secret).
$facebook = new Facebook(array(
  'appId'  => $config['App_ID'],
  'secret' => $config['App_Secret'],
  'cookie' => true
));



if(isset($_POST['status']))
{
    $group_id = $_POST['group'];
    
    $publish = $facebook->api('/'.$group_id.'/feed', 'post',
            array('access_token' => $_SESSION['token'],
            'message'=> 'Testing',
            'from' => $config['App_ID'],
            'to' => $group_id,
            'caption' => 'PHP Gang',
            'name' => 'PHP Gang',
            'link' => 'https://www.phpgang.com/',
            'picture' => 'https://www.phpgang.com/wp-content/themes/PHPGang_v2/img/logo.png',
            'description' => 'Testing with PHPGang.com Demo'
            ));
        $publish = $facebook->api('/'.$group_id.'/feed', 'post',
        array('access_token' => $_SESSION['token'],'message'=>$_POST['status'] .'   via PHPGang.com Demo',
        'from' => $config['App_ID']
        ));
        $message = 'Status updated.<br>';
        $graph_url_groups = "https://graph.facebook.com/v2.1/me/groups?access_token=".$_SESSION['token'];

    $groups = json_decode(file_get_contents_curl($graph_url_groups)); // get all groups information from above url.
   
    $dropdown = "";
    for($i=0;$i<count($groups->data);$i++)
    {
        $dropdown .= "<option value='".$groups->data[$i]->access_token."-".$groups->data[$i]->id."'>".$groups->data[$i]->name."</option>";
    }
    
    $content = '
    <style>
    #status
    {
        width: 357px;
        height: 28px;
        font-size: 15px;
    }
    </style>
    '.$message.'
    <form action="index.php" method="post">
    Select Group on which you want to post status: <br><select name="group" id="status">'.$dropdown.'</select><br><br>
    <input type="text" name="status" id="status" placeholder="Write a comment...." />
    <input type="submit" value="Post On My Group!" style="padding: 5px;" />
    <form>';
}
elseif(isset($_GET['fbTrue']))
{
    $token_url = "https://graph.facebook.com/v2.1/oauth/access_token?"
        . "client_id=".$config['App_ID']."&redirect_uri=" . urlencode($config['callback_url'])
        . "&client_secret=".$config['App_Secret']."&code=" . $_GET['code'];
    
    $response = file_get_contents_curl($token_url);   // get access token from url
    $params = null;
    parse_str($response, $params);

    $graph_url = "https://graph.facebook.com/v2.1/me?access_token=" 
        . $params['access_token'];
        $_SESSION['token'] = $params['access_token'];
    $user = json_decode(file_get_contents_curl($graph_url)); // Get user information from given url
    
    
    $graph_url_groups = "https://graph.facebook.com/v2.1/me/groups?access_token=".$_SESSION['token'];
    $groups = json_decode(file_get_contents_curl($graph_url_groups)); // get all groups information from above url.
   
    
    $dropdown = "";
    for($i=0;$i<count($groups->data);$i++)
    {
        $dropdown .= "<option value='".$groups->data[$i]->id."'>".$groups->data[$i]->name."</option>";
    }
    
    $content = '
    <style>
    #status
    {
        width: 357px;
        height: 28px;
        font-size: 15px;
    }
    </style>
    '.$message.'
    <form action="index.php" method="post">
    Select Group on which you want to post status: <br><select name="group" id=status>'.$dropdown.'</select><br><br>
    <input type="text" name="status" id="status" placeholder="Write a comment...." />
    <input type="submit" value="Post On My Group!" style="padding: 5px;" />
    <form>';
}
else
{
    $content = '<a href="https://www.facebook.com/dialog/oauth?client_id='.$config['App_ID'].'&redirect_uri='.$config['callback_url'].'&scope=email,publish_stream,publish_actions,user_groups"><img src="./images/login-button.png" alt="Sign in with Facebook"/></a>';
}

echo $content; 

function file_get_contents_curl($url) {
    $ch = curl_init();

    curl_setopt($ch, CURLOPT_HEADER, 0);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); //Set curl to return the data instead of printing it to the browser.
    curl_setopt($ch, CURLOPT_URL, $url);

    $data = curl_exec($ch);
    curl_close($ch);

    return $data;
}
?>

Above code first of all authenticate you permission from facebook and then show a form with a drop down and a text box to select group and status to update.

In my script you can post on one group at 1 time but if you want to post on all groups in one click you can modify script and do it easily.

You can can make change and create a auto facebook group posting application.

That’s all for this tutorial hope you guyz like this tutorial please feel free to comment below.