The script must save the graphs in /var/www/html/grafika directory .
It displays the web page with the text but no graphs. Error log :
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AH01215: ERROR: Could not save png to '/var/www/html/grafika/graphHour.png
Permmissions and ownership of /grafika (and dirs above) :
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drwxrws---. 2 root apache 6 Jan 15 12:15 grafika
I know its not right to give full permissions but this is a testing configuration.