Is it advisable to handle form processing within the same form in PHP?

It is generally not advisable to handle form processing within the same form in PHP as it can lead to messy and difficult to maintain code. It is better to separate the form processing logic into a separate PHP file to keep the code organized and easier to debug. 

// Separate form processing logic into a separate PHP file
// form.php
<form method="POST" action="process_form.php">
    <!-- Form fields go here -->
    <input type="submit" value="Submit">
</form>

// process_form.php
<?php
if ($_SERVER["REQUEST_METHOD"] == "POST") {
    // Process form data here
}
?>

Keywords

form processing PHP validation security submission

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