Can't find a way to monitor a log and trigger an action

[ZabbixBeginner]

Hi everyone,
I am trying to monitor a log and to trigger an action when a regexp is found in the log. But somehow, even after reading the docs, watching tutorials, I can't seem to get it.
I could set an item and It was detecting the right lines that were containing the regexp, but when it comes to setting a trigger, I can't find how. I tried using the find() function :

find(/zabbixMonitored/log[/var/log/logtest.log,,,,skip,,,,],,"like","error")=1

But with this, the trigger is fired whether or not the line contains the "error" key. Any idea why ?

[adminjerry]

Hi,
At first glance replace "like" with "iregexp".