What debugging techniques can be used to identify and fix errors in PHP form submission scripts, specifically related to form field values not being passed correctly?

To identify and fix errors in PHP form submission scripts where form field values are not being passed correctly, you can start by checking the form method (POST or GET) and ensuring that the form fields are named correctly in the HTML form. Additionally, you can use PHP's $_POST or $_GET superglobals to retrieve the form field values in your PHP script. 

<form method="post" action="process_form.php">
    <input type="text" name="username">
    <input type="password" name="password">
    <button type="submit">Submit</button>
</form>
```

```php
<?php
if ($_SERVER["REQUEST_METHOD"] == "POST") {
    $username = $_POST['username'];
    $password = $_POST['password'];
    
    // Use the form field values as needed
}
?>

Keywords

PHP debugging form submission form field values error identification

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