title: PHP file_get_contents sometimes failed to open stream Http request failed
body: <p>I have an ajax call that gets many, many pages of contents from a website, but it fails to open steams sometimes even though the same exact links that failed to open streams works just fine, when I ran them again. The problem is, then other links would failed to open stream. Anyone know why this is happening?</p>
  
  <pre><code>Warning: file_get_contents(http://www.merriam-webster.com/browse/dictionary/a/acoustically.htm): failed to open stream: HTTP request failed!
  </code></pre>