process.php

<?php 
	//set time zone
	date_default_timezone_set("Asia/Colombo");
	$dateAndTime = date('Y-m-d h:i:sa');
	$ipAddress = $_SERVER['REMOTE_ADDR'];
    $browser = $_SERVER['HTTP_USER_AGENT'];

 	$sendObj = new \stdClass();
	if (isset($_POST['name']) && $_POST['comment']) {

		   $myFile = "comments.json";
		   $arr_data = array(); // create empty array
		try{
			   //Get form data
			   $formdata = array(
			      'name'=> $_POST['name'],
			      'comment'=> $_POST['comment'],
			      'date' =>$dateAndTime,
			      'ip' => $ipAddress,
			      'browser' => $browser
			   );

			   //Get data from existing json file
			   $jsondata = file_get_contents($myFile);

			   // converts json data into array
			   $arr_data = json_decode($jsondata, true);

			   // print_r($formdata);

			   // Push user data to array
			   // array_push($arr_data,$formdata);
				$arr_data[] = $formdata;
		       //Convert updated array to JSON
			   $jsondata = json_encode($arr_data, JSON_PRETTY_PRINT);
			   
			   //write json data into data.json file
			   if(file_put_contents($myFile, $jsondata)) {
			        $sendObj->massage = "Done";
			        $sendObj->user = $_POST['name'];
			        $sendObj->comment = $_POST['comment'];
			        $sendObj->date = $dateAndTime;
			    }
			   else{
				        // echo "error";
				    $sendObj->massage = "Error";
					$sendObj->cause = "Unable to save data on server";
			   	
			   } 

		   }
		   catch (Exception $e) {
			    $sendObj->massage = "Error";
				$sendObj->cause = "Exception occured " . $e->getMessage();

	            // echo 'Caught exception: ',  $e->getMessage(), "\n";
		   }	
		}else{
			$sendObj->massage = "Error";
			$sendObj->cause = "no necessary data";

		}
		die(json_encode($sendObj));
	
 ?>