Someone

<?php
$count=5;
$array=array($count);

do{
$count=$count-1;
$addcount=array($count);
$array=array_merge($array,$addcount);
} while ($count!=0);
print_r($array);

$key=array_search(6,$array);
if($key=="FALSE"){echo 'did not find a matching key in this array';}
else{echo $key;};

?>