How can two forms in PHP be designed to not influence each other when filled out?

To ensure that two forms in PHP do not influence each other when filled out, you can use separate form names and submit buttons for each form. This way, the data from each form will be processed separately and will not interfere with each other.

<form action="process_form1.php" method="post">
    <!-- Form 1 fields -->
    <input type="text" name="form1_field1">
    <input type="submit" value="Submit Form 1">
</form>

<form action="process_form2.php" method="post">
    <!-- Form 2 fields -->
    <input type="text" name="form2_field1">
    <input type="submit" value="Submit Form 2">
</form>