0037023: Deprecated error in PHP 8.5 when checking the installation in the admin panel

ID	Project	Category	View Status	Date Submitted	Last Update
0037023	mantisbt	administration	public	2026-04-15 11:46	2026-04-18 10:28

Reporter	raspopov	Assigned To	dregad
Priority	normal	Severity	minor	Reproducibility	always
Status	resolved	Resolution	fixed
Product Version	2.26.0
Target Version	2.28.2	Fixed in Version	2.28.2

Summary	0037023: Deprecated error in PHP 8.5 when checking the installation in the admin panel
Description	The following error appears on page in the Email checks section: `DEPRECATED: Using null as an array offset is deprecated, use an empty string instead Raised in file <...>\admin\check\check_email_inc.php on line 98`
Additional Information	`check_email_inc.php` line 98: `$t_users_without_email = $t_duplicate_emails[null] ?? [];` It probably needs to be fixed to: `$t_users_without_email = $t_duplicate_emails[''] ?? [];`
Tags	PHP 8.5

MantisBT: master-2.28 daf676b9 2026-04-17 06:31 dregad Details Diff	Fix PHP 8.5 deprecation warning in admin checks Using null as an array offset is deprecated, use an empty string instead Fixes 0037023		Affected Issues 0037023
	mod - admin/check/check_email_inc.php		Diff File

dregad 2026-04-17 03:03 developer ~0071017	Introduced in 2.26.0 by fix for 0032940 (MantisBT master dd34193c).