(PHP 4 >= 4.2.0, PHP 5, PHP 7, PHP 8)
ngettext — Plural version of gettext
$singular, string $plural, int $count): stringThe plural version of gettext(). Some languages have more than one form for plural messages dependent on the count.
singularThe singular message ID.
pluralThe plural message ID.
countThe number (e.g. item count) to determine the translation for the respective grammatical number.
   Returns correct plural form of message identified by 
   singular and plural
   for count count. 
  
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
?>