Output content from log file into zabbix dashboard, regexp example

On the client side create item that looks for specific condition in log file

UserParameter=custom_item,if exist c:\pat\to\output.log cat c:\pat\to\output.log | grep -e "content.*found" | tail -1

To use the last value use tail -1.
To use first value use head -1.

Into zabbix server create item custom_item with text value:

Create trigger name

Details from log file {ITEM.LASTVALUE}

Formula

{servername:custom_item.regexp(content)}=1

Do not use quotes inside regex()!

If the log file meets defined condition it will be reported into Zabbix dashboard :)