Keyword enddeclare PHP

<?php
$count = 0;
function example() {
  global $count;
  $count++;
  echo "$count instruksi dieksekusi<br>";
}
register_tick_function('example');

declare(ticks=1):
  $cars = ["Avanza", "Volvo", "BMW"];
  foreach($cars as $car) {
    echo "$car <br>";
  }
enddeclare;
?>
  /* Output : 
1 instruksi dieksekusi
Avanza
2 instruksi dieksekusi
Volvo
3 instruksi dieksekusi
BMW
4 instruksi dieksekusi
5 instruksi dieksekusi