What are the potential drawbacks of relying on the referrer to create a breadcrumb navigation in PHP?

The potential drawback of relying on the referrer to create a breadcrumb navigation in PHP is that it may not always be reliable, as the referrer header can be easily manipulated or missing. To solve this issue, a more robust approach would be to manually set and maintain the breadcrumb trail within your PHP application. 

// Example of manually setting and maintaining a breadcrumb trail in PHP

// Define an array to store the breadcrumb trail
$breadcrumbs = array();

// Add each breadcrumb item manually
$breadcrumbs[] = array('url' => 'home.php', 'title' => 'Home');
$breadcrumbs[] = array('url' => 'products.php', 'title' => 'Products');
$breadcrumbs[] = array('url' => 'category.php', 'title' => 'Category');

// Display the breadcrumb trail
foreach($breadcrumbs as $breadcrumb) {
    echo '<a href="' . $breadcrumb['url'] . '">' . $breadcrumb['title'] . '</a> > ';
}

Keywords

referrer breadcrumb navigation drawbacks PHP reliability

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