php man page for textdomain

TEXTDOMAIN(3)								 1							     TEXTDOMAIN(3)

textdomain - Sets the default domain

SYNOPSIS
       string textdomain (string  $text_domain)

DESCRIPTION
	This function sets the domain to search within when calls are made to gettext(3), usually the named after an application.

PARAMETERS
	      o $text_domain
		- The new message domain, or NULL to get the current setting without changing it

RETURN VALUES
	If successful, this function returns the current message domain, after possibly changing it.

PHP Documentation Group 													     TEXTDOMAIN(3)