How can you dynamically change the source of an iframe in PHP based on user input?

To dynamically change the source of an iframe in PHP based on user input, you can use JavaScript to update the iframe src attribute. You can pass the user input to a PHP script, which then generates the desired URL based on the input. This URL can be passed back to the JavaScript function that updates the iframe source. 

<?php
if(isset($_POST['user_input'])){
    $user_input = $_POST['user_input'];
    // Generate the URL based on user input
    $url = "https://www.example.com/?input=".$user_input;
}
?>

<!DOCTYPE html>
<html>
<head>
    <title>Dynamic Iframe Source</title>
</head>
<body>
    <form method="post">
        <input type="text" name="user_input">
        <input type="submit" value="Submit">
    </form>
    <iframe id="myIframe" src="<?php echo isset($url) ? $url : ''; ?>"></iframe>

    <script>
        document.querySelector('form').addEventListener('submit', function(e){
            e.preventDefault();
            var userInput = document.querySelector('input[name="user_input"]').value;
            var newUrl = "https://www.example.com/?input=" + userInput;
            document.getElementById('myIframe').src = newUrl;
        });
    </script>
</body>
</html>

Keywords

PHP iframe dynamic source user input

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