gistfile1.php

<?php
/* Set up array with options for the context used by file_get_contents(). */
$opts = array(
  'http'=>array(
  'method'=>"GET",
  'header'=>"Accept-language: en\r\n" .
            "User-Agent: phpSec (http://phpsec.xqus.com)\r\n"
  )
);

/* Create context. Allowing us to specify User-Agent. */
$context = stream_context_create($opts);

/* Get data from remote server. */
$data = file_get_contents('http://example.com', null, $context);