Initial Setup

Author: rohitnairtech

chatbot.php

@@ -0,0 +1,68 @@
+<?php
+
+$access_token="xxxxx";
+
+$verify_token = "xxxxx";
+
+$hub_verify_token = null;
+
+$wordList_greeting = array("hi", "hii", "hello", "hey");
+
+if(isset($_REQUEST['hub_challenge'])) {
+    $challenge = $_REQUEST['hub_challenge'];
+    $hub_verify_token = $_REQUEST['hub_verify_token'];
+}
+
+if ($hub_verify_token === $verify_token) {
+    echo $challenge;
+}
+
+$input = json_decode(file_get_contents('php://input'), true);
+
+$sender = $input['entry'][0]['messaging'][0]['sender']['id'];
+$message = $input['entry'][0]['messaging'][0]['message']['text'];
+$message = strtolower($message);
+if ($message) {
+	if (in_array($message, $wordList_greeting)) {
+			$message_Response = 'Hi! Welcome to my page';
+		}
+}
+else
+{
+	$message_Response = "Hey I'm just a ChatBot. Wait for a real human to reply!";
+}
+//API Url
+$url = 'https://graph.facebook.com/v2.6/me/messages?access_token='.$access_token;
+
+
+//Initiate cURL.
+$ch = curl_init($url);
+//JSON DATA
+$jsonData = '{
+    "recipient":{
+        "id":"'.$sender.'"
+    },
+    "message":{
+    	"text":"'.$message_Response.'",
+      }
+}';
+
+//Encode the array into JSON.
+$jsonDataEncoded = $jsonData;
+
+//Tell cURL that we want to send a POST request.
+curl_setopt($ch, CURLOPT_POST, 1);
+
+//Attach our encoded JSON string to the POST fields.
+curl_setopt($ch, CURLOPT_POSTFIELDS, $jsonDataEncoded);
+
+//Set the content type to application/json
+curl_setopt($ch, CURLOPT_HTTPHEADER, array('Content-Type: application/json'));
+//curl_setopt($ch, CURLOPT_HTTPHEADER, array('Content-Type: application/x-www-form-urlencoded'));
+
+//Execute the request
+if(!empty($message)){
+    $result = curl_exec($ch);
+}
+curl_close($ch);
+?>