There are two methods to take user input in PHP in two dimensional (2D) array.
Approach 1:
- Use HTML forms through PHP GET & POST method to take user input in two dimensional (2D) array.
- First, input data into HTML forms.
- Then use the GET or POST method of PHP to get or post those input data into a variable.
- Finally, use that variable that holds input data and process using for loop.
- Though it is from a two-dimensional array so, you need two indices/variables for processing in for loop.
- Enter input one below another to state as two variables.
Example 1: Below example illustrate how to input user data for 2D-array using the Form POST method.
php
<?phpecho "Enter n for nxn : <br>";echo "<form method='POST'> Row:<input type='number' min='2' max='5' name='1d' value='1'/> Column:<input type='number' min='2' max='5' name='2d' value='1'/> <input type='submit' name='submit' value='Submit'/></form>";// Submit user input data for 2D arrayif (isset($_POST['submit'])) { // POST submitted data $dimention1 = $_POST["1d"]; // POST submitted data $dimention2 = $_POST["2d"]; echo "Entered 2d nxn: " . $dimention1 . "x" . $dimention2 . " <br>"; $d = []; $k = 0; for($row = 0; $row < $dimention1; $row++) { for ($col = 0; $col < $dimention2; $col++) { $d[$row][$col]= $k++; } } for ($row = 0; $row < $dimention1; $row++) { for ($col = 0; $col < $dimention2; $col++) { echo $d[$row][$col]." "; } echo "<br>"; }}?> |
Output:
Approach 2:
- To take user input in PHP for two dimensional (2D) by using fopen() function which helps to get user input either at runtime or by the external input file.
- First, assign those input data to variables.
- Finally, use those variables which hold input data and process using for loop.
- Though it is from a two-dimensional array so, you need two indices/variables for processing in for loop.
Example: Below example illustrates how to input user data for a 2D array using fopen() function.
php
<?php// fopen() using standard input?><?phperror_reporting(0);echo "\n\n\nEnter row and column: \n";// Right trim fgets(user input) $dimention1 = rtrim(fgets($stdin));// Right trim fgets(user input)$dimention2 = rtrim(fgets($stdin));echo "Entered row and column: " . $dimention1 . "x" . $dimention1 . " \n";$d = [];$k = 0;for ($row = 0; $row < $dimention1; $row++) { for ($col = 0; $col < $dimention2; $col++) { $d[$row][$col]= $k++; }}for ($row = 0; $row < $dimention1; $row++) { for ($col = 0; $col < $dimention2; $col++) { echo $d[$row][$col]." "; } echo "\n";}?> |
Output:
Reference: https://www.geeksforgeeks.org/php-fopen-function-open-file-or-url/
