PHP Script Version Checking/Notification

Question

How can I check the version of my script against an online file to see if it\'s the latest version?

For clarification, I\'m talking about a script I wrote, not the v

Answer 1

Per comments on this answer

// Substitue path to script with the version information in place of __FILE__ if necessary
$script = file_get_contents(__FILE__);
$version = SOME_SENSIBLE_DEFAULT_IN_CASE_OF_FAILURE;
if(preg_match('//', $script, $version_match)) {
    $version = $version_match[1];
}