How can the use of plain JS instead of jQuery affect the handling of POST data in PHP?

Using plain JS instead of jQuery to handle POST data in PHP can affect the way data is sent to the server. When using plain JS, you need to manually serialize the form data before sending it via an XMLHttpRequest object. This can be done by iterating over form elements and constructing a query string. On the PHP side, you need to access the POST data using the $_POST superglobal as usual. 

<?php
if ($_SERVER["REQUEST_METHOD"] == "POST") {
  parse_str(file_get_contents("php://input"), $_POST);
  
  // Access POST data
  $username = $_POST['username'];
  $password = $_POST['password'];

  // Process the data
}
?>

Keywords

plain JS jQuery POST data PHP handling

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