create a numeric pyramid with random numbers

xmas_tree.php

<?php
//You'd find it useful to resolve the http://bit.ly/aySVgM problem ;)

//Number of total rows
$tot_row=100;
//Spacer between the numbers
$spacer=' ';
//file where the pyramid will be saved
$file='triangle.txt';

$tbl=array();
$pyramid='';
for($i=1; $i<=$tot_row;$i++){
    for($e=1;$e<=$i;$e++) $tbl[$i][]=rand(1,9);  
    $row_limit='';
    for($r_s=1;$r_s<=$tot_row-$i;$r_s++) $row_limit.=$spacer;
    $pyramid.=$row_limit.trim(implode($spacer,$tbl[$i]),$spacer)."\n";
}
file_put_contents($file,$pyramid);