Can I submit a form and add record to DB by only php in the same file without using Get/Post methods?

Say I have create a registration form. Now to add records into a DB, we send the data to another php file by POST method, where we do some validations and add a record. Is it possible to do it in the same file without sending and getting the data by POST/GET? If no, then why?

EDIT: Even sending to the same php file is SENDING and losing resource. I ask this question because I want to avoid the lost of time on sending by GET/POST and getting by the same Get/POST. And if it 开发者_如何学Cis not posible, I want to understand why PHP does not allow.

No. You always have to send data from the client to the server, there is no way around that.

If you dont want to reload the entire page the user is on, you could submit the data via AJAX to the php file responsible for processing it and adding the data. That way the user never leaves the page.

yes ofcourse.

just in your form "action" put

$_SERVER['PHP_SELF']

then in the beginning of your PHP page check if the $_POST is set or not

if(isset($_POST))
{
   // actions to be taken after form submission
}

ofcourse you can add a hidden input tag for refining checks for the $_POST. eg in your form

<input type="hidden" name="formSubmit" value="yes" />

then your check should be like

if(isset($_POST['formSubmit']))
{
       // actions to be taken after form submission
}

It's possible. For example:

<?php
if(true === isset($_POST['submit']) // check if submit-button was clicked
{
    // do some validation here...

    // If validation successes add record into db here...
}
else // no post data sent so output the form
{
    // output the form here...
}

Yes it is possible set

action="same page"

in form tag. you can access your all form attributes on same page.

Yes it is easy. The form can post back to its self. This is most easily done by not even specifying the value of action in the form tag.

<form method='POST'>

Then at the top of the page before any content is put on the page, include an if statement to check if the form was submitted.

if (isset ($_POST['post'])) { // 'post' is the name of the submit button
    $error = false;
    // Do validation

From there do validation and act according to the result.
If you have lots of validation to do, perhaps put that in another file and include it.

    include "formValidation.php";

If all is well and all tests are passed use

    if ($error === false) {
        Header ("Location: confirmation.php"); 
        exit;
    }
}

If tests fail, stay on the page keeping all the post data, and display an error.

if (isset ($error) && !empty ($error)) {
    echo "<div class='error'>$error</div>";
}