Steps to reproduce:

1. Install PHP 8 (8.0.5)
2. Go to monitoring -> maps

Result:

Httpd error log reads:

PHP Fatal error: Uncaught ArgumentCountError: array_merge() does not accept unknown named parameters in /usr/share/webapps/zabbix/include/classes/macros/CMacrosResolver.php:2118

Stack trace:

#0 /usr/share/webapps/zabbix/include/classes/macros/CMacrosResolver.php(2118): array_merge(label: Array, urls: Array)

#1 [internal function]: CMacrosResolver->{closure}(Array)

#2 /usr/share/webapps/zabbix/include/classes/macros/CMacrosResolver.php(2119): array_map(Object(Closure), Array)

#3 /usr/share/webapps/zabbix/include/classes/macros/CMacrosResolverHelper.php(674): CMacrosResolver->resolveMacrosInMapElements(Array, Array)

#4 /usr/share/webapps/zabbix/include/classes/helpers/CMapHelper.php(103): CMacrosResolverHelper::resolveMacrosInMapElements(Array, Array)

#5 /usr/share/webapps/zabbix/include/classes/screens/CScreenMap.php(36): CMapHelper::get('3', Array)

#6 /usr/share/webapps/zabbix/app/views/monitoring.map.view.php(91): CScreenMap->get()

#7 /usr/share/webapps/zabbix/include/classes/mvc/CView.php(122): include('/usr/share/weba...')

#8 /usr/share/webapps/zabbix/include/classes/core/ZBase.php(618): CView->getOutput()

#9 /usr/share/webapps/zabbix/include/classes/core/ZBase.php(547): ZBase->processResponseFinal(Object(CRouter), Object(CControllerMapView))

#10 /usr/share/webapps/zabbix/include/classes/core/ZBase.php(211): ZBase->processRequest(Object(CRouter))

#11 /usr/share/webapps/zabbix/include/config.inc.php(25): ZBase->run('default')

#12 /usr/share/webapps/zabbix/zabbix.php(22): require_once('/usr/share/weba...')\n#13 {main}

{{ thrown in /usr/share/webapps/zabbix/include/classes/macros/CMacrosResolver.php on line 2118}}