title: What does a ^ sign mean in a URL?
body: <p>What is the meaning of a ^ sign in a URL?</p>
  
  <p>I needed to crawl some link data from a webpage and I was using a simple handwritten PHP crawler for it. The crawler usually works fine; then I came to a URL like this:</p>
  
  <p><code>http://www.example.com/example.asp?x7=3^^^^^select%20col1,col2%20from%20table%20where%20recordid%3E=20^^^^^</code></p>
  
  <p>This URL works fine when typed in a browser but my crawler is not able to retrieve this page. I am getting an "HTTP request failed error".</p>