Hello,

the syntax is flexible it terms of the delimiter character, being borrowed from the sed tool. Practically you can replace / with any other character to make it easier to write your substitution expression.

The ! is used for DBURL because there are / in the content (like: mysql://...) which should be escaped (like: mysql:\/\/:...) if / would be used as delimiter.

So, you can use whatever delimiter you want and should be fine, like: "/regexp/subst/flags", "!regexp!subst!flags" or "ZregexpZsubstZflags".

Cheers,
Daniel

On 19.09.22 12:11, Fredrik Dahlgren wrote:
Hi,

I'm looking at a kamailio config where all substdef have the syntax "!regexp!subst!flags", "!DB_URL!db.example.com!g" but i can't find this syntax in the documentation. It's currently running on a fairly modern 5.x version and as far as i know it has never been on 4.x or older.

Does anyone know where this syntax is from and if it's possible/recommended to simply replace it with "/regexp/subst"?

Fredrik Dahlgren | Senior SIP/VoIP Engineer


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