<?php
$input = '38,39';
$line = '';
$output = '';
$output_arr = array();
$input_array = explode(',',$input);
$line_array = array();
// create input string
for($i=0;$i<40;++$i){
$add = ' ';
foreach ($input_array as $key=>$value) {
if ($value == $i){
$add = 'x';
}
}
$line .= $add;
}
echo $line."\n";
for($x=1;$x<50;++$x){
$output = '';
for($i=1;$i<41;++$i){
if (($i > 1) AND (substr($line, $i-2, 1) == 'x')) {
$above_left = 1;
} else {
$above_left = 0;
}
if ((substr($line, $i-1, 1)) == 'x') {
$above = 1;
} else {
$above = 0;
}
if ((substr($line, $i, 1)) == 'x') {
$above_right = 1;
} else {
$above_right = 0;
}
if ((($above_left + $above + $above_right) == 2) OR (($above + $above_right) == 1)) {
$output .= 'x';
} else {
$output .= ' ';
}
}
echo $output."\n";
$line = $output;
}
// $output_arr = array();
// $input_array = explode(',',$input);
// $line_array = array();
?>