REST API error

Hi,

I have a PHP script which calls the REST API through get_file_content (),

This is the script

$context = stream_context_create(
        array(
            "http" => array(
                "header" => "User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/50.0.2661.102 Safari/537.36"
            )
        )
    );
$uri="http://mysite.com/wp-json/tribe/events/v1/events?page=1&per_page=50&start_date=2000-01-01" ;

$json = file_get_contents($uri,false, $context);

$posts= json_decode($json);

I call the script from the following url

http://mysite.com/myscript.php

Show me a error

Warning: file_get_contents(http://mysite.com/wp-json/tribe/events/v1/events?page=1&per_page=50&start_date=2000-01-01): failed to open stream: HTTP request failed! in myscript.php on line 12

But if I put url in a browser

http://mysite.com/wp-json/tribe/events/v1/events?page=1&per_page=50&start_date=2000-01-01

Browser shows me results.

Why the script gives me an error ?