Print pyramid pattern - php

Question

1
1 2 1
1 2 3 2 1
1 2 1
1
$newline = "\r\n";
$prnt = '*';
$nos = 3;
for($i = 1; $i <= 2; $i++)
{
for($s = $nos; $s >= 1; $s--)
{
echo " ";echo " ";echo " ";
}
for($j = 1; $j <= $i; $j++)
{
echo $j;echo " ";
}
$m = 2;
for($k = 1; $k <= ($i - 1); $k++)
{
echo $k;echo " ";
}
echo '<br />';
$nos--;
}
$nos = 1;
for($i = 3; $i >= 1; $i--)
{
for ($s = $nos; $s >= 1; $s--) {
echo " ";echo " ";echo " ";
}
for($j = 1; $j <= $i; $j++)
{
echo $j;echo " ";
}
for($k = 1; $k <= ($i - 1); $k++)
{
echo $k;echo " ";
}
$nos++;
echo '<br />';//printf("\n");
}
i got output
1
1 2 1
1 2 3 1 2
1 2 1
1
am not able to print space when i use echo ' '; so i used echo " "; but i dont want to use echo " "; plz resolve this issue.
I am having problem creating above program but somewhere missing a value may be need apply some condition over there . Please see my code.

Answer 1

Printing multiple spaces in straight HTML isn't allowed because of how it must be rendered.
If you want to print exactly - whitespaces included - just wrap your code with a <pre/> tag.
<pre>Spacing will be literal.</pre>
You could also format with the white-space CSS property by setting it to pre.
.spaces {
white-space: pre;
}
<div class="spaces">Spacing will be literal.</div>

Answer 2

This is a fun little algorithm. Here's a recursive solution in PHP. I wrap it in <PRE> tag so that I can use spaces and new lines "\n".
<pre>
<?php
function printPyramid($height) {
// initialize
$size = ($height * 2) - 1;
$half = $size / 2;
$arr = Array();
for($r = 0; $r < $size; $r++) {
$arr[] = array();
for($c = 0; $c < $size; $c++) {
$arr[$r][] = "";
}
}
$arr[$half][$half] = $height;
// recursively build, pass array as reference "&"
pyramidRec($arr, $half, $half, $size);
// print
for($r = 0; $r < $size; $r++) {
for($c = 0; $c < $size; $c++) {
if(empty($arr[$r][$c]))
echo " ";
else if(strlen($arr[$r][$c]) == 1)
echo "{$arr[$r][$c]} ";
else
echo $arr[$r][$c];
}
echo "\n";
}
}
function pyramidRec(&$arr, $r, $c, $size) {
$val = $arr[$r][$c];
$newVal = $val - 1;
if($newVal == 0)
return;
// up
if($r - 1 >= 0 && empty($arr[$r-1][$c])) {
$arr[$r-1][$c] = $newVal;
pyramidRec($arr, $r-1, $c, $size);
}
// down
if($r + 1 < $size && empty($arr[$r+1][$c])) {
$arr[$r+1][$c] = $newVal;
pyramidRec($arr, $r+1, $c, $size);
}
// left
if($c - 1 >= 0 && empty($arr[$r][$c-1])) {
$arr[$r][$c-1] = $newVal;
pyramidRec($arr, $r, $c-1, $size);
}
// right
if($c + 1 < $size && empty($arr[$r][$c+1])) {
$arr[$r][$c+1] = $newVal;
pyramidRec($arr, $r, $c+1, $size);
}
}
printPyramid(5);
?>
</pre>