Question

我有这些数组，我想通过创建一个动态变量来遍历每个数组，该变量将自己的名字自动放入foreach循环中

foreach ($activities.$i as &$activity) { //$i = 1,2,3,4..
   //code

}

//activities
$activities1 = $_POST["activities1"];
$activities2 = $_POST["activities2"];
$activities3 = $_POST["activities3"];
$activities4 = $_POST["activities4"];

Answer 1

更简单的方法是简单地使用数组命名hack：

<input name="activities[1]" ..>
<input name="activities[2]" ..>
<input name="activities[3]" ..>

使你成为$_POST['activities']数组：

foreach($_POST['activities'] as $i => $value) {
   // $i -> 1,2,3,4
}

但是如果你坚持将索引嵌入到密钥的名称中，那么：

foreach(range(1,4) as $i) {
    foreach($_POST["activities{$i}"] as $value) {
        ...
    }
}

如何创建动态数组变量

1 个答案: