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There is a distinction between how input and output are managed, and this document will walk you through that.
wp_kses() can be used on everything that is expected to contain HTML.
111111111 is not a valid zip code but would be saved fine with the function above).
This style of validation most closely follows Word Press’ whitelist philosophy: only allow the user to input what you’re expecting.
There are several variants of the main function, each featuring a different list of built-in defaults.
A popular example is wp_kses_post(), which allows all markup normally permitted in posts.
since by definition it would strip the scripts that are being generated.