Hacking WordPress – how to show all comments with a custom quicktag

One of the blessings in WordPress is the vast array of plugins available. However, it is also one of the curses….because it makes us lazy. While this doesn’t seem to be problematic in the short term, in the longer term, large numbers of plugins can cause blogs to slow down, and even worse, the various plugins could start interfering with each other. So, whenever I can, I like to write my own code – the two advantages are that
1 – I can control exactly what goes in to the code, making it do what I need and no more
and
2 – I’ve written the code so if things start to clash, it’s going to be easier to debug.

So, let’s learn how to create a WordPress page to display every comment on our blog and just for fun, let’s also code up a quicktag which we can place into any page or post where we want the comments displayed.
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