如何在不知道 id 的情况下获取 POST 数据？

Question

I have a script that prints out divs in a loop. I need each one to have a submit button to POST data that's specific to that div.

How do I get the ID of the post so I can submit it to the database?

HTML in PHP echo ($t is incremented for each loop):

<form id="foo'.$t.'">
<input id="bar'.$t.'" name="bar" type="text" value="'.$link.'" />

<input type="submit" value="Report as broken" >
</form>

I tried to get the id of the post by treating it like an array or using var_dump, but was unsuccessful.

PHP script:

if ($_POST) {
// prepare
        $stmt = $con->prepare("INSERT INTO reports (link) VALUES (?)");

// set parameters
        $a = isset($_POST) ? $_POST : null;

// bind
        $stmt->bind_param("s", $a);

// run
        $stmt->execute();
        $stmt->close();
}

Answer 1

Add a hidden field with post id:

<form id="foo'.$t.'">
    <input id="bar'.$t.'" name="bar" type="text" value="'.$link.'" />
    <input type="hidden" name="post_id" value="Some value" />
    <input type="submit" value="Report as broken" >
</form>

On server side you can do something like:

$stmt = $con->prepare("UPDATE reports SET link = ? WHERE id = ?"); // or post_id

// set parameters
$link = $_POST['bar'];
$id = $_POST['post_id'];

// bind, I presume your id is number so we pass `i` as argument
$stmt->bind_param("si", $link, $id);

// run
$stmt->execute();
$stmt->close();