how to strip out the http"// in php?
<p>supposed a variable named $url,whcih value maybe <code>$url=http://www.example.com</code> or <code>$url=http://example.com</code> or <code>$url=www.example.com</code></p>

<p>now, i want to echo the $url in <code>www.example.com</code> style, how to does this? thank you.</p>
