Api.php

<?php

	include 'config.php';
	
	
	if (isset($_SERVER['HTTP_ORIGIN'])) {
           header("Access-Control-Allow-Origin: {$_SERVER['HTTP_ORIGIN']}");
           header('Access-Control-Allow-Credentials: true');
           header('Access-Control-Max-Age: 86400');    // cache for 1 day
        }

        // Access-Control headers are received during OPTIONS requests
        if ($_SERVER['REQUEST_METHOD'] == 'OPTIONS') {

          if (isset($_SERVER['HTTP_ACCESS_CONTROL_REQUEST_METHOD']))
          header("Access-Control-Allow-Methods: GET, POST, OPTIONS");         

          if (isset($_SERVER['HTTP_ACCESS_CONTROL_REQUEST_HEADERS']))
          header("Access-Control-Allow-Headers:        {$_SERVER['HTTP_ACCESS_CONTROL_REQUEST_HEADERS']}");

          exit(0);
       }


    $json = $_SERVER['HTTP_JSON'];
    echo "JSON: \n";
    echo "--------------\n";
    var_dump($json);
    echo "\n\n";
 
    $data = json_decode($json);
    echo "Array: \n";
    echo "--------------\n";
    var_dump($data);
    echo "\n\n";
 	
    $phone = $data->{'phoneNumber'};
    
    $name = $data->{'userName'};

   if ($phone != '' || $name != '') {

	    $Q = "INSERT INTO user(phone_number, name) VALUES('" . $phone . "', '" . $name . "')";
	    $R = $mysqli->query($Q);
  
    }
    else{
    	echo "No value found";
    }

?>