PHP 8.2 "Deprecated" warning

[stafra]

Prerequisites

• I have searched for duplicate or closed issues
• I can recreate the issue with all plugins disabled

Describe the issue

When GSSAPI auth (SSO) is enabled, lot of PHP Deprecation warnings appears in the apache error log file:

[Wed Aug 28 08:53:45.874531 2024] [proxy_fcgi:error] [pid 1579676] [client xxx.xxx.xxx.xxx:16368] AH01071: Got error 'PHP message: PHP Deprecated:  strlen(): Passing null to parameter #1 ($string) of type string is deprecated in /var/www/roundcube.sso/program/lib/Roundcube/rcube.php on line 945; PHP message: PHP Deprecated:  GSSAPIContext::initSecContext(): Passing null to parameter #2 ($input_token) of type string is deprecated in /var/www/roundcube.sso/program/lib/Roundcube/rcube_imap_generic.php on line 679; PHP message: PHP Deprecated:  GSSAPIContext::initSecContext(): Passing null to parameter #3 ($reqflags) of type int is deprecated in /var/www/roundcube.sso/program/lib/Roundcube/rcube_imap_generic.php on line 679; PHP message: PHP Deprecated:  GSSAPIContext::initSecContext(): Passing null to parameter #4 ($timereq) of type int is deprecated in /var/www/roundcube.sso/program/lib/Roundcube/rcube_imap_generic.php on line 679', referer: https://some.site.ltd/?_task=mail&_mbox=INBOX
[Wed Aug 28 08:53:45.895700 2024] [proxy_fcgi:error] [pid 1577627] [client xxx.xxx.xxx.xxx:40378] AH01071: Got error 'PHP message: PHP Deprecated:  strlen(): Passing null to parameter #1 ($string) of type string is deprecated in /var/www/roundcube.sso/program/lib/Roundcube/rcube.php on line 945; PHP message: PHP Deprecated:  GSSAPIContext::initSecContext(): Passing null to parameter #2 ($input_token) of type string is deprecated in /var/www/roundcube.sso/program/lib/Roundcube/rcube_imap_generic.php on line 679; PHP message: PHP Deprecated:  GSSAPIContext::initSecContext(): Passing null to parameter #3 ($reqflags) of type int is deprecated in /var/www/roundcube.sso/program/lib/Roundcube/rcube_imap_generic.php on line 679; PHP message: PHP Deprecated:  GSSAPIContext::initSecContext(): Passing null to parameter #4 ($timereq) of type int is deprecated in /var/www/roundcube.sso/program/lib/Roundcube/rcube_imap_generic.php on line 679', referer: https://some.site.ltd/?_task=mail&_mbox=INBOX
[Wed Aug 28 08:53:46.001539 2024] [proxy_fcgi:error] [pid 1647283] [client xxx.xxx.xxx.xxx:59828] AH01071: Got error 'PHP message: PHP Deprecated:  strlen(): Passing null to parameter #1 ($string) of type string is deprecated in /var/www/roundcube.sso/program/lib/Roundcube/rcube.php on line 945; PHP message: PHP Deprecated:  GSSAPIContext::initSecContext(): Passing null to parameter #2 ($input_token) of type string is deprecated in /var/www/roundcube.sso/program/lib/Roundcube/rcube_imap_generic.php on line 679; PHP message: PHP Deprecated:  GSSAPIContext::initSecContext(): Passing null to parameter #3 ($reqflags) of type int is deprecated in /var/www/roundcube.sso/program/lib/Roundcube/rcube_imap_generic.php on line 679; PHP message: PHP Deprecated:  GSSAPIContext::initSecContext(): Passing null to parameter #4 ($timereq) of type int is deprecated in /var/www/roundcube.sso/program/lib/Roundcube/rcube_imap_generic.php on line 679', referer: https://some.site.ltd/?_task=mail&_mbox=INBOX

What browser(s) are you seeing the problem on?

Firefox

What version of PHP are you using?

8.2.7

What version of Roundcube are you using?

1.6.8

JavaScript errors

No response

PHP errors

No response

[alecpl]

Fixed.