How can dynamic URLs be generated through form input in PHP?

Dynamic URLs can be generated through form input in PHP by using the $_GET superglobal array to retrieve form input data and then appending this data to the URL as query parameters. This allows for creating dynamic URLs that can pass information between different pages or sections of a website. 

<form action="process_form.php" method="GET">
    <input type="text" name="username" placeholder="Enter your username">
    <input type="submit" value="Submit">
</form>
```

In the process_form.php file:
```php
if(isset($_GET['username'])){
    $username = $_GET['username'];
    $url = "profile.php?username=" . urlencode($username);
    header("Location: $url");
    exit();
}

Keywords

PHP dynamic URLs form input URL generation query parameters

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