<!DOCTYPE html>
<html>
<body>

<?php
$a=array("Volvo"=>"XC90","BMW"=>"X5");
if (key_exists("Toyota",$a))
  {
  echo "¼ü´وشع£،";
  }
else
  {
  echo "¼ü²»´وشع£،";
  }
?>

</body>
</html>