How can multiple forms on a single page in PHP be processed without data from the last form overriding previous form data?

When processing multiple forms on a single page in PHP, you can use unique names for each form and check which form was submitted using hidden input fields or submit buttons. By doing this, you can ensure that data from one form does not override data from another form.

<?php
// Check which form was submitted
if(isset($_POST['form1_submit'])) {
    // Process data from form 1
    $form1_data = $_POST['form1_data'];
}

if(isset($_POST['form2_submit'])) {
    // Process data from form 2
    $form2_data = $_POST['form2_data'];
}
?>

<form method="post">
    <input type="text" name="form1_data">
    <input type="submit" name="form1_submit" value="Submit Form 1">
</form>

<form method="post">
    <input type="text" name="form2_data">
    <input type="submit" name="form2_submit" value="Submit Form 2">
</form>