Form POST data handling with WordPress - wordpress

Question

I have hard time figuring out how to recieve form data. This is how my form looks like:
<form action="register" method="POST">
<input type="hidden" name="action" value="process_form">
<input type="email" placeholder="Enter email" name="email">
<input type="password" placeholder="Enter password" name="password">
</form>
How can I access the data of my form?

Answer 1

You should change your form action to something like this:
action="<?= esc_url(admin_url('admin-post.php')) ?>"
And add a hidden input in your form like this:
<input type="hidden" name="action" value="add_foobar">
And then in your backend class add an action like this:
namespace Class\Namespace;
class ClassName {
public function init() {
add_action( 'admin_post_add_foobar', [$this, 'handleForm'] );
}
public function handleForm() {
// your logic here
// use $_POST to retrieve post data
}
....
Make sure to include your class in your functions.php of your theme, like this:
(new \Class\Namespace\ClassName)->init();
To read form data, then in your handleForm method just use $_POST.
For more examples have a look at this page.

Answer 2

After the form has been submitted, you can access it on the page it loads with the PHP $_POST variable.
eg.
$email = $_POST['email'];
Remember to validate and sanitise this variable as it will be what the user has entered.