PHP sudoku maker any ideas?

cooldude832 · July 30, 2007

This idea just came to me(i don't know its like a gift (guess what movie that's from)) making a sudoku (single level) off php. Anyone got a logical idea on doing it, I know i need to generate 81 random numbers and then compare it to values, but i have a feeling since its is a top down sort of system i will get to the last squares and it will never find a match and end up making dead puzzles any ideas?

Humpty · July 30, 2007

Doing the if then or switch (select case) statements is probably the easiest thing to do. Then the next would be the displaying.

I think perhaps you were looking for some magical formula or equation or algorithm or similar.

Why not keep it simplistic and make the puzzle howyou would by hand, check this out:

http://www.sudokuonline.us/make_your_own_sudoku_puzzle.php

I know that once you've done it I would be interested in the code. Sounds like a fun thing to actually create too.

May I suggest perhaps AJAX or JS for the actual game play.

Can't wait to see your finished product

cooldude832 · July 30, 2007

I got it going except i want to define the 3x3 boxes as i go and i'm having trouble figuring out how to do it in logic, this is what i got

<?php
<?php
DEFINE("MAX", 9);
$board = array();
$colored = 0;
while($colored <=27){
$temp1 = rand(1,MAX);
$temp2 = rand(1,MAX);
$square = $temp1."_".$temp2;
if(empty($board[$square])){
	$board[$square] = "colored";
	$colored++;
}
}
$i = 1;
while($i <=MAX){
$j = 1;
while($j <=MAX){
	$temp = $j."_".$i;
	if(empty($board[$temp])){
		$board[$temp] = "empty";
	}
	$j++;
}
$i++;
}
?>
<html>
<head>
<style type="text/css">
td{
	width: 48px;
	height: 40px;
	border-style: solid;
}
td.filled{
	background-color: #0066CC;
}
tr.third{
	border-style: double;
}
</style>
</head>
<body>
<CENTER>
<table width="600">
<?php
$i = 1;
while($i <=MAX){
if($i%3 == 0){
	echo "<tr class=\"third\">\n";
}
else{
	echo "<tr>\n";
}
$j = 1;
while($j <=MAX){
	$temp = $j."_".$i;
	if($board[$temp] == "colored"){
		echo "<td class=\"filled\">".$temp."</td>";
		}
	else{
			echo "<td>".$temp."</td>";
	}
	$j++;
}
echo "\n</tr>\n";
$i++;
}
?>

cooldude832 · July 30, 2007

I reworked it with a lot of while loops to get the 28 blocked out squares so to speak of

<?php
DEFINE("MAX", 9);
$board = array();
$colored = 0;
while($colored <=27){
$temp1 = rand(1,MAX);
$temp2 = rand(1,MAX);
$square = $temp1."_".$temp2;
if(empty($board[$square])){
	$board[$square] = "colored";
	$colored++;
}
}
$i = 1;
while($i <=MAX){
$j = 1;
while($j <=MAX){
	$temp = $j."_".$i;
	if(empty($board[$temp])){
		$board[$temp] = "empty";
	}
	$j++;
}
$i++;
}
?>
<html>
<head>
<style type="text/css">
table.grid td{
	width: 48px;
	height: 40px;
	border-style: solid;
}
td.filled{
	background-color: #0066CC;
}
</style>
</head>
<body>
<CENTER>
<table width="600" cellspace="5">
<?php
$x = 1;
$y = 1;
$rows = 1;
while($rows <=3){
echo "<tr>";
$cols = 1;
	while($cols <=3){
		echo "<td>\n<table class=\"grid\">\n";
		$i = 1;
		while($i <=3){
			echo "<tr>\n";
			$j = 1;
				while($j <=3){
					$temp = $x."_".$y;
					if($board[$temp] == "colored"){
						echo "<td class=\"filled\">".$temp."</td>\n";
					}
					else{
						echo "<td>".$temp."</td>\n";
					}
					$j++;
					if($x <9){$x++;}
					else{$x = 1;}
				}
			echo "</tr>\n";
			$i++;
			if($y <9){$y++;}
			else{$y = 1;}
		}
		echo "</table>\n\n</td>";
		$cols++;
	}
echo "</tr>";
$rows++;
}

?>
</table>

it echos a nice table with the 3x3 all there

tippy_102 · July 30, 2007

FYI - there is a Sudoku programmers forum at http://www.setbb.com/phpbb/

Humpty · July 30, 2007

or this link even, it works: http://www.setbb.com/phpbb/?mforum=sudoku

cooldude832 · July 30, 2007

Thanks for that, I was kind of trying to write my own algorthims to make boards so that I can learn some stuff about it, but if i get stuck i'll go there.

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