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run code in 150+ php & hhvm versions
Bugs & Features
<?php class SudokuSolver { protected $sudokuColumns; public function __construct ($sudoku) { $this->sudokuColumns = $sudoku; } protected static function getNumbers () { return array_flip(str_split("123456789")); } // could be static as well public function printOut ($sudoku) { foreach ($sudoku as $column) { foreach ($column as $cell) { echo "|"; if (null !== $cell) { echo $cell; } else { echo " "; } } echo "|\n"; } } public function solve() { if (!$this->checkConsistenz()) { throw new Exception("inconsistent data!"); } } protected function checkConsistenz () { $columns = $this->sudokuColumns; foreach ($columns as $columnIndex => $column) { if (!$this->checkLine($columnIndex,$column)) { return false; } } // check rows -> own method $rows = array(); foreach ($columns as $columnIndex => $column) { foreach ($column as $rowIndex => $cell) { $rows[$rowIndex][$columnIndex] = $cell; } //$this->printOut($rows); } foreach ($rows as $rowIndex => $row) { if (!$this->checkLine($rowIndex,$row)) { return false; } } // check field -> own method $fields = array(); foreach ($columns as $columnIndex => $column) { foreach ($column as $rowIndex => $cell) { //echo "(3 * ($columnIndex / 3)) + ($rowIndex / 3) = ". (3 * ($columnIndex / 3)) ." + ". ($rowIndex / 3) ."\n"; $fields[(3 * intval($columnIndex / 3)) + intval($rowIndex / 3)][] = $cell; } } //print_r($fields); foreach ($rows as $rowIndex => $row) { if (!$this->checkLine($rowIndex,$row)) { return false; } } return true; } protected function checkLine ($rowIndex, $row) { $numbers = self::getNumbers(); echo "checking $rowIndex..\n"; foreach ($row as $column) { if (null === $column) { continue; } //echo "$column , $numbers\n" . var_export(strpos($numbers,$column),true); if (!array_key_exists($column,$numbers)) { return false; } unset($numbers[$column]); } return true; } } $sudoku = array(); $sudoku[] = array(null,3,null, null,null,null, null,null,null); $sudoku[] = array(null,3,null, 1,9,5, null,null,null); $sudoku[] = array(null,null,8, null,null,null, null,6,null); $sudoku[] = array(8,null,null, null,6,null, null,null,null); $sudoku[] = array(4,null,null, 8,null,null, null,null,1); $sudoku[] = array(null,null,null ,null,2,null, null,null,null); $sudoku[] = array(null,6,null, null,null,null, 2,8,null); $sudoku[] = array(null,null,null, 4,1,9, null,null,5); $sudoku[] = array(null,null,null, null,null,null, null,7,null); $sudokuSolver = new SudokuSolver($sudoku); //$sudokuSolver->printOut($sudoku); $sudokuSolver->solve($sudoku);
Output for 7.0.0 - 7.1.0
checking 0.. checking 1.. checking 2.. checking 3.. checking 4.. checking 5.. checking 6.. checking 7.. checking 8.. checking 0.. checking 1.. Fatal error: Uncaught Exception: inconsistent data! in /in/Gu7jL:36 Stack trace: #0 /in/Gu7jL(114): SudokuSolver->solve(Array) #1 {main} thrown in /in/Gu7jL on line 36
Process exited with code 255.
Output for 5.0.0 - 5.0.2, 5.0.5 - 5.6.28
checking 0.. checking 1.. checking 2.. checking 3.. checking 4.. checking 5.. checking 6.. checking 7.. checking 8.. checking 0.. checking 1.. Fatal error: Uncaught exception 'Exception' with message 'inconsistent data!' in /in/Gu7jL:36 Stack trace: #0 /in/Gu7jL(114): SudokuSolver->solve(Array) #1 {main} thrown in /in/Gu7jL on line 36
Process exited with code 255.
Output for 5.0.3 - 5.0.4
checking 0.. checking 1.. checking 2.. checking 3.. checking 4.. checking 5.. checking 6.. checking 7.. checking 8.. checking 0.. checking 1.. Fatal error: Uncaught exception 'Exception' with message 'inconsistent data!' in /in/Gu7jL:36 Stack trace: #0 /in/Gu7jL(36): SudokuSolver::solve() #1 /in/Gu7jL(114): SudokuSolver->solve(Array) #2 {main} thrown in /in/Gu7jL on line 36
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/Gu7jL on line 5
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1
Parse error: parse error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/Gu7jL on line 5
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `T_OLD_FUNCTION' or `T_FUNCTION' or `T_VAR' or `'}'' in /in/Gu7jL on line 5
Process exited with code 255.