How can a user pass parameters between different PHP forms?

To pass parameters between different PHP forms, you can use methods such as GET or POST to send data from one form to another. GET method appends data to the URL, while POST method sends data in the HTTP request body. You can then retrieve the parameters in the receiving form using $_GET or $_POST superglobals.

// Sending form with parameters using GET method
<form action="second_form.php" method="get">
    <input type="text" name="param1">
    <input type="submit" value="Submit">
</form>

// Receiving form to retrieve parameters
<?php
if(isset($_GET['param1'])){
    $param1 = $_GET['param1'];
    echo "Parameter 1: " . $param1;
}
?>