警告：输入中出现意外的字符：使用Unirest API时，'\'（ASCII = 92）状态= 1

I am using php5.6 and wamp5 1.6.5.

I am trying simply code as below

$response=Unirest\Request::get("https://indianpost.p.mashape.com/getPincodes.php?name=delhi",array("X-Mashape-Key" => "mykey","Accept" => "application/json"));

Then i am getting below errors.Can any help me out from here.

Warning: Unexpected character in input: '\' (ASCII=92) state=1 in
C:\wamp\www\myapplication\index.php on line 11

Parse error: parse error, unexpected T_STRING in 
C:\wamp\www\myapplication\index.php on line 11

Please help me.

This is the code

 <!DOCTYPE html>
 <html>
 <head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <title></title>
 </head>
 <body>
    <?php
    // put your code here
     // These code snippets use an open-source library.
       $response = 
     Unirest\Request::get("https://indianpost.p.mashape.com/getPincodes.php?
     name=delhi",array("X-Mashape-Key" => "mykey","Accept" => 
     "application/json"));
    ?>
  </body>
 </html>