我必须用PHP制作一个名为"Lights Out"的小游戏，我首先要制作一个5x5矩阵，每个元素都必须是0到1之间随机选择的数字。
稍后，当我想处理我的文件并访问无线电输入中选择的选项（打开或关闭）时，我必须知道无线电指示在哪个小区。我试图将以下内容添加到我的值中：[$row][$column]，但它似乎不起作用（错误非法偏移类型）。
有人能告诉我为什么会出现这个错误吗？我真的需要知道收音机在哪一行哪一列。
提前感谢！
<form action="Processing.php" method="post">
<?php
$matrix = array(
array(rand(0,1), rand(0,1), rand(0,1), rand(0,1), rand(0,1)),
array(rand(0,1), rand(0,1), rand(0,1), rand(0,1), rand(0,1)),
array(rand(0,1), rand(0,1), rand(0,1), rand(0,1), rand(0,1)),
array(rand(0,1), rand(0,1), rand(0,1), rand(0,1), rand(0,1)),
array(rand(0,1), rand(0,1), rand(0,1), rand(0,1), rand(0,1))
);
echo "<table border='"1'">"; // echo matrix in a html table
foreach ($matrix as $row) { // rows
echo "<tr>";
foreach ($row as $column) { // columns
echo "<td>";
echo $column . "<br />";
echo "<input type='"radio'" name='"I_O'" value='"O $matrix[$row][$column]'" /> O"; // off
echo "<br />";
echo "<input type='"radio'" name='"I_O'" value='"I $matrix[$row][$column]'" /> I"; // on
echo "</td>";
}
echo "</tr>";
}
echo "</table>";
?></form>
您的foreach结构只为您提供值，但您将它们用作数组的索引。我已经稍微成功了（还没有测试），但这应该会帮助你：
<form action="Processing.php" method="post">
<?php
$matrix = array(
array(rand(0,1), rand(0,1), rand(0,1), rand(0,1), rand(0,1)),
array(rand(0,1), rand(0,1), rand(0,1), rand(0,1), rand(0,1)),
array(rand(0,1), rand(0,1), rand(0,1), rand(0,1), rand(0,1)),
array(rand(0,1), rand(0,1), rand(0,1), rand(0,1), rand(0,1)),
array(rand(0,1), rand(0,1), rand(0,1), rand(0,1), rand(0,1))
);
echo "<table border='"1'">"; // echo matrix in a html table
foreach ($matrix as $rowIx => $row) { // rows
echo "<tr>";
foreach ($row as $columnIx => $val) { // columns
$checked = $val ? 'checked="checked" ' : '';
echo "<td>";
echo $val . "<br />";
echo "<input type='"radio'" name='"I_O'" $checked value='"{$rowIx},{$columnIx}'" />";
echo "</td>";
}
echo "</tr>";
}
echo "</table>";
?></form>
edit：使单选按钮的值以逗号分隔成行和列的索引矩阵。