vBulletin Mods

in vb4 we can use <vb:each> as a foreach within templates. This is actually a very cool feature.

I am trying to port it to vb3 but am having some difficulty.

Looking into the files I have found 3 that correspond to this feature.
class_template_parser.php
adminfunctions_template.php
template_tag_defs.php

for creating vb3 if conditions the only file I could come up with that was responsible for them was.
adminfunctions_template.php

how could I go about adding this into vb3 so I could use for each's within templates?

The complete class is:

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