We have tons of cases when zabbix users update a huge template and are getting PHP timeout, which is actually a blank page in browser.

Would it be possible to implement own timeout control and display a nice message in zabbix frontend instead of a reacing PHP fatal error with blank page ?

A link I quickly found for the topic https://stackoverflow.com/questions/7493676/detecting-a-timeout-for-a-block-of-code-in-php

That would be useful even if we will improve the templates management so such operations will not be heavy like currently.