(PHP 4, PHP 5, PHP 7)
bindtextdomain — Sets the path for a domain
$domain
   , string $directory
   )The bindtextdomain() function sets the path for a domain.
domainThe domain
directoryThe directory path
   The full pathname for the domain currently being set.
  
Example #1 bindtextdomain() example
<?php
$domain = 'myapp';
echo bindtextdomain($domain, '/usr/share/myapp/locale');
?>
The above example will output:
/usr/share/myapp/locale