Form submission PHP form submission to itself

In most cases, we specify another URL address to process the form content to the Action attribute, but in some cases, we need to submit the form data to ourselves. How should we specify the Action attribute value at this time?
if (isset($_POST['action']) && $_POST['action'] == 'submitted') {
print '

'; <br> print_r($_POST); <br> print '<a href="'. $_SERVER['PHP_SELF'] .'">Please try again</a>'; <br> print '

';
} else {
?>

Name:
Email:

Beer:

                                                                                < "Submitted" This will allow you to submit the form to yourself (Note: In versions prior to PHP 4.1.0, please use $_HTTP_POST_VARS instead of the $_Post variable in the code below). The server variable $_Server is used here to obtain the URL address of the current page and assign it to the Action attribute of the form. A small trick is used here to determine whether the server receives the URL request whether it is a POST request or a GET request. That is to add a hidden variable to the form. When processing the request, we use the isset function to detect whether this hidden variable is set, thereby determining whether the request uses the POST or GET method.

The above introduces the form submission PHP form submission to yourself, including the content of form submission. I hope it will be helpful to friends who are interested in PHP tutorials.

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