What role does $_SERVER[HTTP_REFERER] play in this scenario and how can it be utilized?

$_SERVER['HTTP_REFERER'] is a server variable that contains the URL of the referring page. In this scenario, it can be utilized to track where the user is coming from before landing on the current page. This information can be useful for analytics, redirection, or personalization purposes. 

if(isset($_SERVER['HTTP_REFERER'])) {
    $referer = $_SERVER['HTTP_REFERER'];
    // You can then use $referer for tracking, redirection, or personalization
}

Keywords

$_SERVER HTTP_REFERER scenario utilization PHP

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