Check if URL is external or internal in PHP

Check if URL is external or internal in PHP. We are going to use parse_url PHP native function. Function parse_url parses a URL and returns an associative array containing any of the various components of the URL that are present.

Source code viewer
$url_host = parse_url($external_url, PHP_URL_HOST);
$base_url_host = parse_url($internal_url, PHP_URL_HOST);
 
if($url_host == $base_url_host || empty($url_host))
{
  // internal link ...
}
else
{
  // external link ...
}
Programming Language: PHP

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Check if URL is external or internal in PHP

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