Json with PLSQL ( PLJSON)

[flgarcia]

Hello,
I'm having trouble finding a way to use some PLSON functionality that helps me validate a string and escape characters that do not conform to the following:

any-Unicode-character-
except-"-or--or-
control-character

I would like something that if in my string find something other than that I substitute for something.

Tks

[geemus]

I don't really have any knowledge of PLSQL or PLJSON, perhaps there are other places where you might get a response from someone with a bit more context?