When using wp-templates to create pages, I see these parameters {post_title} The problem is that I have some information like version, how can I declare a list variable, for example version=10 and use it on other pages like {version}?
Any parameters that you see like {post_title} are added either by your theme or a plugin. They aren’t part of WordPress’s standard code. Being something that’s used in templates it’s more likely that its’ going to be from your theme.