How can PHP developers ensure that links from a database are displayed correctly without interference from the existing website URL?

When displaying links from a database in PHP, developers can ensure that the links are displayed correctly without interference from the existing website URL by using the PHP function `parse_url()` to extract the hostname from the database link and compare it with the current website's hostname. If they do not match, the full link from the database can be displayed as is. If they do match, only the path and query parameters from the database link should be displayed to avoid interference. 

// Assume $link is the link fetched from the database
$parsed_link = parse_url($link);
$current_host = $_SERVER['HTTP_HOST'];

if($parsed_link['host'] == $current_host){
    echo $parsed_link['path'] . '?' . $parsed_link['query'];
} else {
    echo $link;
}

Keywords

PHP database links URL interference display.

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