.mktime and .strftime gives wrong day of week

[mfandel]

Problem: the php code is returning the wrong day of the week on a statistics report the software generates. So when you go run the statistics page and it queries the DB it returns a value but the wrong day label shows up.

In my test case I have data only on Thursday of the month and when I run the report it shows up as data for Sunday.

Here are what I assume are the two section of code from my research.. rather than posting the entire php file. I guess at least I think I narrowed down the code section...small victories.

The code used to get the first day of the month is (which i have seen out there and compared and looks like it is correct):

function get_first_day($day_number=1, $month=false, $year=false)

{

$month = ($month === false) ? strftime("%m"): $month;

$year = ($year === false) ? strftime("%Y"): $year;


$first_day = 1 + ((7+$day_number - strftime("%w", mktime(0,0,0,$month, 1, $year)))%7);


return mktime(0,0,0,$month, $first_day, $year);

}

Before I go on I have also tried to set $day_number=1 to various values 0-6, but seems to have no effect. I read several post that setting that value was the problem, but made no difference for me. I thought maybe the "session" was causing the issue after trying to learn about them, so I tried to log out and log back in clear my cache and also change browsers after changing the value but that got me nowhere.

The code I guess you would say that calls this??? to generate the output report that is not correct is:

<table id="graph_weekday" class="data" style="display:none" cellpadding="0" cellspacing="0" width="100%">

<caption><?php echo _occupancy_per_week." / "._days;?></caption>

<thead>

<tr>

<td class="no_input"> </td>

<?php

foreach ($label_wk as $value) {

echo "<th>".strftime("%A", get_first_day($value, $_SESSION['statistic_month'], $_SESSION['selectedDate_year']))."</th>";

}

?>

</tr>

</thead>

<tbody>

<tr>

<th><?php echo _days;?></th>

<?php

foreach ($data_wk as $value) {

echo "<td>".$value."</td>";

}

?>

</tr>

</tbody>

</table>

}

?>

So things seem to be working to pull the data, but the label is wrong. Though setting the value for $day_number= to something else doesn't seem to work.

Is there something wrong with the.$value. which is being echoed and I need to apply the get_first_day to the value?

Thanks for any help.

[mfandel]

I am trying to dig into this and tracked back to some additional code that might be relevant 

// Bar Plot Guest by weekday/month
$data_wk = array();
$label_wk = array();


$statistic = querySQL('statistic_weekday');


foreach ($statistic as $key => $value) {
foreach($value as $paxsum){
$label_wk[] = $key;
$data_wk[] = $paxsum;
}
}

 

[mfandel]

Ok I think I have it. I was changing the value $day_number=1 to a different number. I wasn't changing the $first_day = 1. When I changed $first_day = 5 it seems to work. Does this seem like it is correct or going to cause me other issues?