how to call a PHP function from a form button

Question

I have a form in my index.html that looks like this:

  .
  .
  .
  .

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Answer 1

Basically there is no "easy" way to do that, you need to write some code in your script that will decide what function to call and when, like:

if($_POST['submit'){
   postData();
}

Another option is to use one of the many MVC framework out there like Codeigniter or laravel.

Answer 2

you can also make your action like this:

<form name="form" method="post" action="send.php?postData">

and in your send.php you can do this:

if(isset($_GET['postData'])){
   postData();
}

Answer 3

Add a unique hidden field in your form like:

<input type="hidden" name="action" value="postData" />

send.php

<?php

    function generatekey () {
      // action
    }

    function postData() {
      // action
    }

    if ( $_POST[ 'action' ] == 'postData' ) {
        postData();
    }

?>

Or read your submit value, if it's unique.