Question

I have a list of dates in an array (in unix integer format).

I have sorted these numbers in ascending order. Done.

Now, I am looping through every element using the foreach command.

I am trying to add a echo '<p>'; every time the hour changes in the data…so I am trying to get a list of the dates, sorted, and with a <p> every hour so they are in hourly blocks…

How to do this?

Answer 1

Is this what you are looking for?

//list of unix timestamps 
$timeStamps = array();
//false data for testing
for($i=1;$i<=30;$i++){
    $timeStamps[] = strtotime("+".($i*10)." minutes");
}

//remember the last value.
$new = '';
$last = '';
//loop through the timestamps
foreach($timeStamps as $ts){
    //generate a hour string for this ts
    $new = date('d-M-Y H', $ts);
    //if this hour string is not the same as the last hour string echo p tag
    if($new != $last){
        echo '<p>';
    }
    //set $last to the new hour string for next loop.
    $new = $last;

    //echo the date
    echo date('d-M-Y H:i', $ts).'<br />';
}

I also included the date in the hour string to prevent problems with the date changing. for example if a timestamp is for 1-NOV-2011 1:00am and the next timestamp is for 2-NOV-2011 1:00am just checking the hour will not echo a <p>. including the date will.