How can HTML elements affect the behavior of PHP scripts in a web page?

HTML elements can affect the behavior of PHP scripts by passing data to the PHP script through form submissions or AJAX requests. By using HTML form elements like input fields, checkboxes, and radio buttons, users can input data that can be processed by PHP scripts. Additionally, HTML elements like buttons can trigger PHP scripts to run when clicked. To ensure proper interaction between HTML elements and PHP scripts, make sure to correctly name form elements and handle data validation and sanitization on the PHP side. 

<?php
if ($_SERVER["REQUEST_METHOD"] == "POST") {
    $username = $_POST["username"];
    $password = $_POST["password"];
    
    // Process the data or perform necessary actions
}
?>

<form method="post" action="<?php echo $_SERVER['PHP_SELF']; ?>">
    <label for="username">Username:</label>
    <input type="text" name="username" id="username">
    
    <label for="password">Password:</label>
    <input type="password" name="password" id="password">
    
    <button type="submit">Submit</button>
</form>

Keywords

HTML elements PHP scripts web page behavior interaction

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