This one is really easy to answer, unfortunately not in a good way for those who like using Wix and want to add php coding to extend their website…You can’t. You can only add HTML coding. So no custom dynamic content. Longer answer: switch to UltimateWB.
Yisrael from Wix responded to a similar custom question in 2019:
Wix does not support PHP, and there are no plans to support it.(via Velo by WIx, “Custom Code/Can I Put PHP Here?”)
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