<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title></title> </head> <body> <?php $valor = filter_input(INPUT_GET, "valor", FILTER_DEFAULT, FILTER_REQUIRE_ARRAY); print_r($valor); ?> <form> <?php for ($i = 0; $i < 3; $i++) { for ($j = 0; $j < 3; $j++) { ?> <input type="text" size="3" name="valor[<?= $i ?>][<?= $j ?>]"> <?php } echo "<br>"; } ?><input type="submit"> </form> </body> </html>