[PHP] Dynamic Sitemap in XML

I did a bit of googling and tried a few tutorials to no avail.

How would I create a sitemap (that is dynamic) in php or another language?

Just want to index all the pages in an easy fashion.

Use one of the tools freely available and update it whenever you update your site. If your site changes more often than that and you're using one of the many available blog platforms, get a plugin.

OR...

Write out the "steps" of what you have to do to build a sitemap, then search for a tutorial on each step. There are about a million results (I'm sure not all of them apply) for "dynamic xml sitemap," including some GitHub sources.