file_get_contents() without "Http" to access external URL [closed]

PHP Snippet 1:

<?php

$ctx = stream_context_create(array(
    'http' => array(
        'timeout' => 16.0 // seconds
    )
));

$contents = file_get_contents('http://...', FALSE, $ctx);

// do something with $contents

PHP Snippet 2:

$ ./test
{
  "headers": {
    "Host": "httpbin.org"
  }
}

$ cat test
#!/usr/bin/env php
<?php

die(file_get_contents('http://httpbin.org/headers'));