Question

如何替换帖子中提交的仅数组元素？

我有一个包含多个复选框的表单，我将所有内容提交到一个PHP页面，我想从另一个中替换一个数组。

形式：

$oldArray = array(
  "colors" => array(1 => "mandarin", "strawberry", "blueberry", "kiwi", "banana"),
  "other"  => array(1 => "test1", "test2", "test3", "test4")
);

目标网页

$newArray = array(
  "colors" => array(1 => "orange", "red", "blue", "green", "yellow"),
  "other"  => array(1 => "example1", "example2", "example3", "example4")
);

print_r( array_replace($_POST['colors'], $newArray['colors']) );

如果我只检查两个元素，“mandarin”和“kiwi”，array_replace会返回：

Array (
  [1] => orange <--- OK
  [2] => strawberry 
  [3] => blueberry 
  [4] => green  <--- OK 
  [5] => banana
)

我如何echo 仅$_POST 元素？

e.g。

 Array (
  [1] => orange
  [4] => green 
)

Answer 1

你应该发布数组密钥。试试这个：

$oldArray = array(
    "colors" => array(1 => "mandarin", "strawberry", "blueberry", "kiwi", "banana"),
    "other"  => array(1 => "test1", "test2", "test3", "test4")
);

echo '<select name="colors">';
foreach ($oldArray['colors'] as $key => $val)
{
    echo '<option value="'.$key.'">'.$val.'</option>';
}
echo '</select>';

然后在您收到的PHP页面中，您可以执行以下操作：

$newArray = array(
    "colors" => array(1 => "orange", "red", "blue", "green", "yellow"),
    "other"  => array(1 => "example1", "example2", "example3", "example4")
);

foreach($_POST['colors'] as $key)
{
    echo $newArray['colors'][$key];
}

Answer 2

尝试：

 print_r(array_intersect ($_POST['colors'],$newArray['colors']));

PHP array_replace只检查$ _POST中的元素

2 个答案: