March 26, 2012

MediaWiki Template Get Hostname

I was working on a template for one my personal wikis and needed to get the hostname for a given URL. Using the capabilities of the Parser Functions extension for MediaWiki I whipped up this template. I figured others may find this useful so here it is. The first version has a bunch of spaces and newlines added to make it more readable.

{% raw %}{{#vardefine: hoststart | {{#expr: {{#pos: {{{1|}}} | // }} + 2 }} }}
{{#vardefine: hostend | {{#pos: {{{1|}}} | / | {{#expr: {{#pos: {{{1|}}} | // }} + 2 }} }} }}
{{#vardefine: hostlen | {{#expr: {{#var: hostend }} - {{#var: hoststart }} }} }}
{{#sub: {{{1|}}} | {{#var: hoststart}} | {{#var: hostlen}} }}{% endraw %}

To put it in your own MediaWiki, copy this version that removes the spaces and newlines.

To use this template put it on a page like Template:Get hostname and then call it in your pages as

{% raw %}{{Get hostname|http://thingelstad.com/another-reason-you-need-to-use-a-password-manager/}}
{% endraw %}

which will return thingelstad.com.


MediaWiki Techie


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