Allow charset to be passed to the wp_die function

[spacedmonkey]

Currently, all the wp_die handlers, use (by guessing) the utf-8 charset. However, this is not allow this isn't allows the correct charset that the site uses. This charset is store in an option on the site. In wp_die options can not be used, as wp_die can be called if a database connection fails. But where wp_die is called and there is a connection, charset could be passed as an arg.

[mohsinrasool]

Newbie here. I developed attached solution by editing functions.php. I tried to follow WordPress coding standard as much as I am aware of. Please guide me if I made any mistakes. Trunk patch is attached.

[socalchristina]

Hi @spacedmonkey and @mohsinrasool. I'm a newbie just trying to learn my way around the contributions process. I like the changes you made @mohsinrasool. I wondered if charset needs a wp_die_handler to override the default handler for wp_die. @spacedmonkey, I'm not sure if this is what you meant by,

Currently, all the wp_die handlers, use (by guessing) the utf-8 charset.

[socalchristina]

Add wp_die_handler

[SergeyBiryukov]

In 46109:

Bootstrap/Load: Allow charset to be passed to the wp_die() function.

Props mohsinrasool, spacedmonkey, socalchristina.
Fixes #46666.

[desrosj]

Mentioned in the Miscellaneous Developer Focused Changes dev note for 5.3: ​https://make.wordpress.org/core/2019/10/15/miscellaneous-developer-focused-changes-in-5-3/