What are the limitations of using a localhost URL for testing scripts in PHP?

When testing scripts in PHP using a localhost URL, the main limitation is that the code may not work properly when deployed to a live server with a different URL structure. To solve this issue, it's better to use relative paths or dynamically generate URLs based on the server environment. 

<?php
// Example of dynamically generating URLs based on the server environment
$base_url = isset($_SERVER['HTTPS']) && $_SERVER['HTTPS'] === 'on' ? "https" : "http";
$base_url .= "://".$_SERVER['HTTP_HOST'];
$base_url .= str_replace(basename($_SERVER['SCRIPT_NAME']),"",$_SERVER['SCRIPT_NAME']);

echo $base_url;
?>

Keywords

localhost URL testing scripts limitations

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