After upgrading Zabbix version to 4.0.28 on CentOS 7, an error is recorded in the web server log and the graph cannot be displayed.
Steps to reproduce:
- upgrade to 4.0.28
- access Monitoring -> Graphs
The error log recorded in the Web server log is as follows.
The graph is displayed without any error being output.
If you check the contents of CLineGraphDraw.php, it uses a description method that is not available in PHP 5.4.16. It is possible to display the graph by changing the description as follows.