(PHP 4 >= 4.2.0, PHP 5)
ngettext — Plural version of gettext
$msgid1
   , string $msgid2
   , int $n
   )The plural version of gettext(). Some languages have more than one form for plural messages dependent on the count.
msgid1
msgid2
n
   Returns correct plural form of message identified by 
   msgid1 and msgid2
   for count n. 
  
Example #1 ngettext() example
<?php
setlocale(LC_ALL, 'cs_CZ');
printf(ngettext("%d window", "%d windows", 1), 1); // 1 okno
printf(ngettext("%d window", "%d windows", 2), 2); // 2 okna
printf(ngettext("%d window", "%d windows", 5), 5); // 5 oken
?>