- implode: documentation ( source)
- array_fill: documentation ( source)
<?php
//$start_date =strtotime('2013-02-13 12:02:00');
//$end_date =strtotime('2013-02-20 12:02:00');
//$total = ($end_date- $start_date);
//echo date("Y-m-d H:i:s",$total);
$count = 5;
for($i=$count;$i>=0;$i--){
$array = array_fill(0,$i,'X');
echo implode("",$array);
echo "<br>";
}