A function() for use in shortening URL links. This plugin is meant for dev work and does not automatically shorten URLs.

tufto

i=== URLs Editor

A FUNCTION for use in shortening URL links. This plugin automatically does shorten URLs.

Steven Vachon

WP-HTML-Compression

Reduce file size by shortening URLs and safely removing all standard comments and unnecessary whitespace from an HTML document.

intuitart

Absolute Relative URLs

Want to host your Wordpress site from a different domain? This plugin will help!

If you were to use this on a website like http;//example.com/test/testing/, you would get results like these:
<ol>
<li>
<ul>
<li>Before: http;//example.com/test/another-test/#anchor</li>
<li>After: ../another-test/#anchor</li>
</ul>
</li>
<li>
<ul>
<li>Before: http;//example.com/wp-content/themes/twentyten/style.css</li>
<li>After: /wp-content/themes/twentyten/style.css</li>
</ul>
</li>
<li>
<ul>
<li>Before: https;//example.com/wp-content/themes/twentyten/style.css</li>
<li>After: https;//example.com/wp-content/themes/twentyten/style.css</li>
</ul>
</li>
<li>
<ul>
<li>Before: http;//google.com/test/</li>
<li>After: //google.com/test/</li>
</ul>
</li>
<li>
<ul>
<li>Before: ../../../../../../../../#anchor</li>
<li>After: /#anchor</li>
<li>After (<code>$output_type=1</code>): ../../#anchor</li>
</ul>
</li>
</ol>
All string parsing. No directory browsing.
If you’re looking for a plugin that will automatically convert all URLs on your WordPress site, instead check out my other plugin, <a href="https://wordpress.org/extend/plugins/wp-html-compression/" rel="ugc">WP-HTML-Compression</a>. 
Before you copy this code and add it into your own, keep in mind that there will probably be future updates. Keeping the code within an installed plugin will make sure that you’re notified.

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