rendered paste body<?php function generate($difficulty) { // set up board size $size=rand(3, 8); // randomize numbers $numbers = range(1, pow($size, 2)); shuffle($numbers); // row index sets $x = 1; for($i = 1; $i <= pow($size, 2); $i++){ $a = "rowIndex_" . $i; //set up variable names eg $rowIndex_1 for($ii = 1; $ii <= pow($size, 2); $ii++){ ${$a}[$ii] = $x; //set up variable eg $rowIndex[0] = 1 $x = $x + 1; } $allRows[$i] = $$a; //set up array eg $temp[0] = $rowIndex_1 } $temp = array_chunk($allRows, $size, true); foreach($temp as $key => $arrRow){ $a = "arrRow_" . $key; // set up variable names $$a = $arrRow; // set up variable $arrAllRows[$key] = $$a; // set up array } // column index sets for($i = 1; $i <= pow($size, 2); $i++){ $a = "colIndex_" . $i; // set up variable names $x = $i; for($ii = 1; $ii <= pow($size, 2); $ii++){ ${$a}[$ii] = $x; // set up variable $x = $x + pow($size, 2); } $allCols[$i] = $$a; // set up array } $temp = array_chunk($allCols, $size, true); foreach($temp as $key => $arrCol){ $a = "arrCol_" . $key; // set up variable names $$a = $arrCol; // set up variable $arrAllCols[$key] = $$a; // set up array } // block index sets $x = 1; $y = 1; for($i = 1; $i <= $size; $i++){ for($ii = 1; $ii <= $size; $ii++){ $a = "blockIndex_" . $x; // set up variable names $z = 1; for($iii = 1; $iii <= $size; $iii++){ for($iv = 1; $iv <= $size; $iv++){ ${$a}[$z++] = $y; // set up variable $y = $y + 1; } $y = $y + ((pow($size, 2)) - ($size)); } $arrAllBlocks[$x] = $$a; // set up array $x = $x + 1; } $y = ($i * $size) + 1; } // set up basic board for($i = 1; $i <= pow($size, 2); $i++){ foreach($arrAllBlocks as $block){ $temp = $numbers; foreach($block as $index){ $data[$index] = array_shift($temp); } $firstNumber = array_shift($numbers); $numbers = array_pad($numbers, pow($size, 2), $firstNumber); } } ksort($data); // shuffle rows for($i = 0; $i <= $size - 2; $i++){ foreach($arrAllRows as $arrRows){ shuffle($arrRows); $arrRows = array_slice($arrRows, 0, 2); // takes first 2 rows foreach($arrRows as $key => $row){ foreach($row as $rowKey => $index){ if($key == 0){ $row_1[$rowKey] = $data[$index]; }else{ $row_2[$rowKey] = $data[$index]; } } } foreach($arrRows as $key => $row){ // swops them foreach($row as $rowKey => $index){ if($key == 0){ $data[$index] = $row_2[$rowKey]; }else{ $data[$index] = $row_1[$rowKey]; } } } } } // shuffle columns for($i = 0; $i <= $size - 2; $i++){ foreach($arrAllCols as $arrCols){ shuffle($arrCols); $arrCols = array_slice($arrCols, 0, 2); // takes first 2 columns foreach($arrCols as $key => $col){ foreach($col as $colKey => $index){ if($key == 0){ $col_1[$colKey] = $data[$index]; }else{ $col_2[$colKey] = $data[$index]; } } } foreach($arrCols as $key => $col){ // swops them foreach($col as $colKey => $index){ if($key == 0){ $data[$index] = $col_2[$colKey]; }else{ $data[$index] = $col_1[$colKey]; } } } } } $solution = implode(",", $data); //remove pairs of numbers symetrically if($difficulty == 1){ $pairs = 16; }elseif($difficulty == 2){ $pairs = 22; }elseif($difficulty == 3){ $pairs = 30; }else{ $pairs = 170; } for($i = 1; $i <= $pairs; $i++){ do{ $number_1 = rand(1, pow($size, 4)); }while($number_1 == (((pow($size, 4) - 1) / 2) + 1)); $data[$number_1] = ''; $number_2 = (pow($size, 4) + 1) - $number_1; $data[$number_2] = ''; } $puzzle = implode(",", $data); return array(pow($size, 2), $puzzle, $solution); }$puzzle=generate(rand(1,3));$unsolved=explode(",", $puzzle[1]);$solved=explode(",", $puzzle[2]);$size=$puzzle[0];$im=imagecreate($size,$size);$count=0;$xsize=imagesx($im);$ysize=imagesy($im);for($i=0; $i<$ysize; $i++) { for($j=0; $j<$xsize; $j++) { switch($count) { case 0: $index=imagecolorallocate($im, $unsolved[($j+($i*$xsize))], 0, 0); $count++; break; case 1: $index=imagecolorallocate($im, 0, $unsolved[($j+($i*$xsize))], 0); $count++; break; case 2: $index=imagecolorallocate($im, 0, 0, $unsolved[($j+($i*$xsize))]); $count=0; break; } imagesetpixel($im, $j, $i, $index); }}//echo "X: $xsize Y: $ysize Fullcount: ".($xsize*$ysize);header("Content-Type: image/gif");imagegif($im);imagedestroy($im);?>