PHP compare current array value to previous value

Question

I've got an array with images and a date for each one. I'm retrieving the date via array explode. I want to take this date value and compare it to the previous date value for the previous image. My goal here is to display these dates as headers for the sets of images that correspond to each different date.

Here is my code I've been fiddling with to try and make this work (sorry for all my slashes):

$p = 0;
$a = -1;
echo "<table>";
echo "<tr>";
foreach (array_combine($images,$locs) as $image => $loc)
{
    $p++;
    $a++;
    $datesort = explode('>',$image);
    echo "<style>";
    echo "input[label=t" . $p . "]    {";
    echo "display: none;";
    echo "}";
    echo "input[label=t" . $p . "] + label   {";
    echo "border: 5px solid #FFFFFF;";
    $image = "background: url('http://blah.com/" . $loctb[$p] . "');";
    echo $image;
    echo "height: 61px;";
    echo "width: 92px;";
    echo "display: inline-block;";
    echo "padding: 0 0 0 0px;";
    echo "}";
    echo "input[label=t" . $p . "]:checked + label   {";
    echo "border: 5px solid #FF9900;";
    echo "background: url('http://blah.com/" . $loctb[$p] . "');";
    echo "height: 61px;";
    echo "width: 92px;";
    echo "display: inline-block;";
    echo "padding: 0 0 0 0px;";
    echo "}";
    echo "</style>";
    $lastdate = array("");
    $lastdate[$a] = $datesort[1];
    echo "<td>";
    if ($lastdate[$a] <> $datesort[1]){
    echo "<h2>";
    echo $datesort[1];
    echo "</h2>";
    }
    echo "<input type=\"checkbox\" label=\"t" . $p . "\" id=\"t" . $p . "\" name =\"boxes[]\" value=\"<img src=http://blah.com/" . $loc . "\" />";
    echo "<label for=\"t" . $p . "\"></label>";
    echo "</div>";
    echo "</td>";
    if ($p % 2 == 0)
    {
    echo "</tr>";
    }
}
echo "</table>";

I've been trying to store the current date value into another array variable and then compare that to the new value the next time through my foreach loop, but I'm doing it wrong :-/...

I'd appreciate any help you can offer. Thanks

You might want to take a look at the heredoc syntax. This will give you much cleaner code. php.net/manual/en/… — Dirk McQuickly
– Dirk McQuickly, Commented Mar 14, 2013 at 20:39

Anthony · Accepted Answer · 2013-03-14 19:55:49Z

2

Here is a quick and dirty way, though you'll want to tune it to your needs (I had this issue but it was worse as I was also filling in the blank dates in between):

$previous_dates = array();

foreach (array_combine($images,$locs) as $image => $loc) {

    $datesort = explode('>',$image);

    if (end($previous_dates) <> $datesort[1]) {
       echo "<h2>";
       echo $datesort[1];
       echo "</h2>";
    }
      // ... more stuff ...//

    $previous_dates[] =  $datesort[1];
}

Really I would reconsider the approach you're taking for the explode within the loop, but first-things-first, see if that gets you where you need to be.

edited Mar 14, 2013 at 19:55

answered Mar 14, 2013 at 19:33

Anthony

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2 Comments

reubenCanowski Over a year ago

Awesome! Your newly edited code did the trick. Appreciate the help. Thanks, Anthony.

Anthony Over a year ago

Yeah, sorry about that. It's what I get for writing code from memory. I think the biggest dilemma you had was simply setting $lastdate = array(""); inside the loop instead of ahead of time. Something I've done a million times just to avoid loop-only variables in my non-loop area.

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