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Hello yes so I let myself be carried away, and then came a new small challenge. In the graph code is the csv file opened and soteret with a "explod" function. and it work fine as long as I only have one column with y data and one with x data. but when I start to get more column's it does not work. I've created a short example below. <?php define("LOG_FILE", "./data/test111/test111-2015-01-17.csv"); $times = array(); $values = array(); $values_test1 = array(); $file_lines = file(LOG_FILE , FILE_IGNORE_NEW_LINES|FILE_SKIP_EMPTY_LINES); foreach($file_lines as $line_num => $line_value) { $line_elements = explode(",", $line_value); $times[] = date($line_elements[0]); $values[] = $line_elements[1]; $values_test1[] = $line_elements[2]; } echo $values[2]; ?> the control echo I make "echo $values[2];" works fine, there is be the expected value. but if I try to "echo $values_test1[2];" so there is nothing. the CSV file looks like this. Date,temp1,temp2 2015-01-23-12-00,54,59 2015-01-23-12-01,54,59 2015-01-23-12-02,54,59 2015-01-23-12-03,54,58 2015-01-23-12-04,54,58 2015-01-23-12-05,54,58 2015-01-23-12-06,54,58 2015-01-23-12-07,54,58 2015-01-23-12-08,54,58 2015-01-23-12-09,54,58 2015-01-23-12-10,54,58 2015-01-23-12-11,53,58 2015-01-23-12-12,53,58 2015-01-23-12-13,53,58 2015-01-23-12-14,53,58 why can I not get the temp2 values into $ values_test1 [] thank you very much