PHP 7.3 compatibility issue

[meetbhanvadia]

Deprecated function: filter_var(): explicit use of FILTER_FLAG_SCHEME_REQUIRED and FILTER_FLAG_HOST_REQUIRED is deprecated in janrain\Sdk::getReferrer() (line 188 of /lib/JanrainPhpSdk/src/janrain/Sdk.php).

[meetbhanvadia]

In PHP 7.3, these two flags are deprecated because they are already implied (since PHP 5.6). The ideal fix is to remove these flags. See php.watch's post about filter_var() deprecation warnings.

So the ideal fix would be replacing the following block with the block followed by it.

public static function getReferrer()
{
$host = @$_SERVER['HTTP_HOST'];
if (empty($host) || !filter_var($host, FILTER_VALIDATE_URL, FILTER_FLAG_HOST_REQUIRED)) {
// no host or invalid host (localhost, etc) fallback to server_name
return @$_SERVER['SERVER_NAME'] ?: gethostname();
}
return $host;
}
replace with this:

public static function getReferrer()
{
$host = @$_SERVER['HTTP_HOST'];
if (empty($host) || !filter_var($host, FILTER_VALIDATE_URL)) {
// no host or invalid host (localhost, etc) fallback to server_name
return @$_SERVER['SERVER_NAME'] ?: gethostname();
}
return $host;
}