How can the HTML structure of a PHP login form affect its functionality?

The HTML structure of a PHP login form can affect its functionality if the form fields are not properly named or organized. This can lead to issues with retrieving and processing user input in the PHP script that handles the form submission. To ensure proper functionality, the form fields should be named correctly and placed within the appropriate HTML form tags. 

<form action="login.php" method="post">
    <label for="username">Username:</label>
    <input type="text" id="username" name="username">
    
    <label for="password">Password:</label>
    <input type="password" id="password" name="password">
    
    <input type="submit" value="Login">
</form>

Keywords

HTML structure PHP login form functionality validation error handling

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