(PHP 4, PHP 5, PHP 7, PHP 8)
textdomain — Sets the default domain
This function sets the domain to search within when calls are made to gettext(), usually the named after an application.
domain
The new message domain, or null
to get the current setting without changing it
If successful, this function returns the current message domain, after possibly changing it.
Note:
The textdomain() information is maintained per process, not per thread.