<?php
function outstr($n)
{
$s = '';
for($j=1;$j<=$n;$j++)
$s1 = '';
for($i=1;$i<=$j;$i++)
$s1 = $s1.$i;
$s .= $s1 . " ";
}
$s .= '<br/>';
return $s;
echo outstr(5);