PHP - 使用$ _POST更新会话数组

Question

I'm new to using PHP sessions and I'm having trouble updating a session array using the form $_POST method.

Basically, each button has a value that I want to add to the array $_SESSION['items'] on each click. However, currently what is happening is the array gets reset and replaced by the last selected value.

Here's what I've got so far:

<?
session_name("test");
session_start();
?>


<form method="post">
    <button type="submit" name="item[]" value="Item 1">Item 1</button>
    <button type="submit" name="item[]" value="Item 2">Item 2</button>
</form>


<?
$_SESSION['items'] = array();
array_push($_SESSION['items'], $_POST['item']);
print_r($_SESSION['items']);
?>

Any help would be appreciated.
Thanks!

Answer 1

It looks like you're resetting the Session array with

$_SESSION['items'] = array();

Leaving that bit out seems to do the trick.

I also suggest you change the name of the buttons to just "item", as you otherwise add an array to your session array with each click and not just a single value. Unless of course that's exactly what you intended.

The new script would look like this:

<?
session_name("test");
session_start();
?>


<form method="post">
    <button type="submit" name="item" value="Item 1">Item 1</button>
    <button type="submit" name="item" value="Item 2">Item 2</button>
</form>


<?
array_push($_SESSION['items'], $_POST['item']);
print_r($_SESSION['items']);
?>