range ( low,high [, $step] );

<?php
   foreach (range(0, 6) as number) {
      echo "number, ";
   }
   print "\n";

   foreach (range(0, 100, 10) as number) {
      echo "number, ";
   }
   print "\n";

   foreach (range('a', 'c') as letter) {
      echo "letter, ";
   }
   print "\n";

   foreach (range('f', 'a') as letter) {
      echo "letter, ";
   }
   print "\n";
?>

0, 1, 2, 3, 4, 5, 6,
0, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100
a, b, c,
f,e,d,c, b, a