How can input fields in a Sudoku game be restricted to only accept numbers from 1-9 using PHP, HTML, and CSS?

To restrict input fields in a Sudoku game to only accept numbers from 1-9, you can use HTML input type "number" along with the "min" and "max" attributes to specify the range. Additionally, you can use PHP to validate the input on the server-side to ensure that only numbers from 1-9 are accepted. Finally, you can use CSS to style the input fields to provide visual feedback to the user. 

<input type="number" name="sudoku_input" min="1" max="9">

Keywords

PHP HTML CSS input fields validation

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