This must be easy , pulling the last record of the day, every day, from a txt

Posted on 16th Feb 2014 07:03 pm by admin

I have a txt file logging weather data every minutes (so 1 record per minute). I want to extract the data from the (and only that one) last record for every single day in the log file.

Each record as a $date , $time, and other $data fields.

In all my projects i use all the data to create graphs (jpgraphs), but for that one i only need the data from the last record of the day. What php function do i need to read the file and only select the last $time of the $date and pickup every last $time on all $date from the file. Of course when that record is ''the one'' for that day , i need to pull the other $data fields (they'll be use to create the graph).

I tried several things, but i'm not able (don't know how) to segregate records looking at different fields in the array and of course pick the right one.

I'm sure it's an easy one, but i just don't get the logic to get it done

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