9X9 SUDOKU Solver Developed in PHP
A sudoku puzzle is a grid of nine by nine squares or cells, that has been subdivided into nine subgrids or "regions" of three by three cells.
The objective of sudoku is to enter a digit from 1 through 9 in each cell, in such a way that: Each horizontal row (shown in pink) contains each digit exactly once Each vertical column (shown in yellow) contains each digit exactly once Each subgrid or region (shown in green) contains each digit exactly once
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Functions in this Code:
sudokuSolver(); // which iterates from the startion position n start solving the problem
isValidValue(); //it validates whether the inserted value is valid according to the rules of sudoku
display(); // this function simply prints out the solutions