How can PHP handle HTTP HEAD requests to determine the validity of a link on the internet?

To handle HTTP HEAD requests in PHP to determine the validity of a link on the internet, you can use the `get_headers()` function. This function sends a HEAD request to the specified URL and returns an array of headers. You can then check the response code to determine if the link is valid (e.g., 200 for success, 404 for not found). 

$url = 'https://www.example.com';
$headers = get_headers($url, 1);

if(strpos($headers[0], '200') !== false) {
    echo 'Link is valid';
} else {
    echo 'Link is not valid';
}

Keywords

PHP HTTP HEAD request link validity internet handling

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