(PHP Extension) CanonicalizeUrl

The CanonicalizeUrl method is a utility function that canonicalizes a URL into a standard form to avoid duplicates. For example, "http://www.chilkatsoft.com/" and "http://www.chilkatsoft.com/default.asp" are the same URL.

Chilkat PHP Downloads PHP Extension for Windows, Linux, MacOS, Alpine Linux, Solaris

<?php

// The version number (9_5_0) should match version of the Chilkat extension used, omitting the micro-version number.
// For example, if using Chilkat v9.5.0.48, then include as shown here:
include("chilkat_9_5_0.php");

$spider = new CkSpider();

// Does a DNS lookup to find the default domain, which may or may not include the "www." depending on the DNS results.
// Also domain names are converted to lowercase:
print $spider->canonicalizeUrl('http://www.ChilkatSoft.com/') . "\n";

// CanonicalizeUrl will drop the HTML fragment:
print $spider->canonicalizeUrl('http://www.chilkatsoft.com/purchase2.asp#buyZip') . "\n";

// If a username/password is in the URL, it gets dropped:
print $spider->canonicalizeUrl('http://username:password@www.chilkatsoft.com/purchase2.asp#buyZip') . "\n";

// Port 80 and 443 are dropped:
print $spider->canonicalizeUrl('http://www.chilkatsoft.com:80/purchase2.asp') . "\n";
print $spider->canonicalizeUrl('https://www.paypal.com:443/') . "\n";

// Removes default pages:
// default.asp, index.html, index.htm, default.html, index.htm, default.htm
// index.php, index.asp, default.php, .cfm, .aspx, ,php3, .pl, .cgi, .txt, .shtml, .phtml
print $spider->canonicalizeUrl('http://www.chilkatsoft.com/index.asp') . "\n";
print $spider->canonicalizeUrl('http://www.chilkatsoft.com/index.asp') . "\n";
print $spider->canonicalizeUrl('http://www.chilkatsoft.com/index.php') . "\n";
print $spider->canonicalizeUrl('http://www.chilkatsoft.com/index.pl') . "\n";
print $spider->canonicalizeUrl('http://www.chilkatsoft.com/index.htm') . "\n";

// Output:
// http://chilkatsoft.com/
// http://chilkatsoft.com/purchase2.asp
// http://chilkatsoft.com/purchase2.asp
// http://chilkatsoft.com/purchase2.asp
// https://www.paypal.com/
// http://chilkatsoft.com/
// http://chilkatsoft.com/
// http://chilkatsoft.com/
// http://chilkatsoft.com/
// http://chilkatsoft.com

?>