Are these very important tools to have?
VqMod and OcMod are both so-called
Override-Functions. Such VqMod and/or OcMod
Files are written, to look for ANCHORS/TAGS, somewhere in one or more specific OC Source
or Theme Files, to then either:
1. ADD some Custom CODE, before or after the Anchor/Tag addressed/targeted,
2. CHANGE/MODIFY/REMOVE the existing Anchor/Tag CODE LINE , in parts, or in full.
3. Extensions, containing VqMods/OcMods, might also consist out of
custom
system/... ,
catalog/... ,
admin/... Core Files, just to have this mentioned too.
---
Therefore, instead of changing default OC-Core Code, in order to add something, change
something, or remove something, the use VqMod or OcMod is very useful, since such files
can always be removed, to so restore the DEFAULT Values again.
But they also have their limits, since ANCHORS/TAGS have to consist out of one single Line,
to be addressed.
And depending on the Theme and/or Custom Modules used, possibly consisting out of Files, to
be placed inside of the OC Directories, some of those VqMods/OcMods need to be slightly
rewritten, to then match the possibly not exactly 'OC-Code like' written Custom File/Theme
Code.
In real professional OC Installations, ONLY one of BOTH Override Functions should be
installed and used. And to make sure, to AVOID any Problems, one should better install
the
Integrated VqMod, created by JNeuhoff, if one really needs to use
VqMods
with the default
OcMod Engine, which is installed by Default in all later OC Versions. It might
keep one from a lot of problems, due to the different Caching Systems, if used otherways...
https://www.opencart.com/index.php?rout ... n_id=19501
I hope, it helps a little...
Ernie