How can PHP be used to check if the user is using the correct URL and redirect them if not?

To check if the user is using the correct URL and redirect them if not, you can compare the current URL with the expected URL using PHP. If the URLs do not match, you can use the header() function to redirect the user to the correct URL. 

<?php
$current_url = $_SERVER['REQUEST_URI'];
$expected_url = "/correct-url";

if ($current_url !== $expected_url) {
    header("Location: https://example.com/correct-url");
    exit();
}
?>

Keywords

PHP URL validation redirection header() $_SERVER

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