Unnecessary warnings appear when host name is not resolved

[xmacan]

In console -> devices -> device -> I got warning (in section SNMP Information):
Warning: SNMP::__construct(): php_network_getaddresses: getaddrinfo failed: Name does not resolve in /usr/local/share/cacti/lib/snmp.php on line 75
System SNMP error - SNMP::get(): Could not open snmp connection: Unknown host (mail.wrong-name.xz) (Invalid argument)

It is happen in the case:

1. wrong hostname
2. PHP SNMP enabled

Without PHP SNMP, I got correctly- Host SNMP error

I guess that the error message should be the same.

Cacti 1.2.17, FreeBSD 12.1, PHP 7.4.8

[netniV]

Let me know if this works for you....

--- a/lib/snmp.php
+++ b/lib/snmp.php
@@ -72,7 +72,7 @@ function cacti_snmp_session($hostname, $community, $version, $auth_user = '', $a
        $timeout_us = (int) ($timeout_ms * 1000);

        try {
-               $session = new SNMP($version, $hostname . ':' . $port, ($version == 3 ? $auth_user : $community), $timeout_us, $retries);
+               $session = @new SNMP($version, $hostname . ':' . $port, ($version == 3 ? $auth_user : $community), $timeout_us, $retries);
        } catch (Exception $e) {
                return false;
        }

[xmacan]

better, now I see only:
SNMP Information
System SNMP error - SNMP::get(): Could not open snmp connection: Unknown host (mail.wrong-name.xz) (Invalid argument)

[netniV]

Is that good enough or should we work on it more?

[xmacan]

I guess that it is enough. PHP warning is gone and message Could not open snmp connection: Unknown host is sufficient