Merge First Edition of RaspAP/raspap-insiders

includes/functions.php

@@ -757,8 +757,12 @@ function qr_encode($str)
     return preg_replace('/(?<!\\\)([\":;,])/', '\\\\\1', $str);
 }
 
-function evalHexSequence($string)
-{
+// Validates a host or FQDN
+function validate_host($host) {
+  return preg_match('/^([a-z\d](-*[a-z\d])*)(\.([a-z\d](-*[a-z\d])*))*$/i', $host);
+}
+
+function evalHexSequence($string) {
     $evaluator = function ($input) {
 	return hex2bin($input[1]);
     };