How to Make Auto Post in Facebook Using PHP

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You just have to create a Facebook App and get your Access Token and need a Facebook PHP SDK to help to post on Facebook.You may also like login with facebook using PHP. You may also like How to Login with Facebook in CodeIgniter.

Before creating Facebook App you need to download Facebook PHP SDK

Get access token https://developers.facebook.com/docs/facebook-login/permissions/v2.2

PHP Code

<?php
require_once("FacebookSDK/facebook.php");

class FacebookApi {
    var $consumer;
    var $token;
    var $method;
    var $http_status;
    var $last_api_call;
    var $callback;
    var $connection;
    var $access_token;

    function __construct($data) {
        $config = array();
        $config['appId'] = $data['consumer_key'];
        $config['secret'] = $data['consumer_secret'];

        $this->connection = new Facebook($config);
    }

    function share($title, $targetUrl, $imgUrl, $description, $access_token) {
        $this->connection->setAccessToken($access_token);
        $params["access_token"] = $access_token;

        if (!empty($title)) {
            $params["message"] = $title;
            $params["name"] = $title;
        }

        if (!empty($targetUrl)) {
            $params["link"] = $targetUrl;
        }

        if (!empty($imgUrl)) {
            $params["picture"] = $imgUrl;
        }

        if (!empty($description)) {
            $params["description"] = $description;
        }

        // post to Facebook
        try {
            $ret = $this->connection->api('/me/feed', 'POST', $params);
        } catch (Exception $e) {
            $e->getMessage();
        }

        return true;
    }

    function getLoginUrl($params) {
        return $this->connection->getLoginUrl($params);
    }

    function getContent($url) {
        $ci = curl_init();
        /* Curl settings */
        curl_setopt($ci, CURLOPT_URL, $url);
        curl_setopt($ci, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($ci, CURLOPT_HEADER, false);
        curl_setopt($ci, CURLOPT_CONNECTTIMEOUT, 10);
        curl_setopt($ci, CURLOPT_SSL_VERIFYPEER, false);

        $response = curl_exec($ci);
        curl_close($ci);
        return $response;
    }

}

$access_token = Your_Access_Token;
$facebookData = array();
$facebookData['consumer_key'] = Your_key;
$facebookData['consumer_secret'] = Your_Secret;

$title = Post_Title;
$targetUrl = Post_URL;
$imgUrl = Image_URL;
$description = Post_Description;

$facebook = new FacebookApi($facebookData);
$facebook->share($title, $targetUrl, $imgUrl, $description, $access_token);

?>