foreach replacing last element with current???

[monkey_05_06]

Hey freaks, long time no see. Not that I was ever very active anyway...

 

So basically I'm doing this:

 

<?php
  echo "before foreach: " . $sets[4]["scriptName"] . "<br />\n";
  foreach ($sets as $set) {
    echo "before: " . $sets[4]["scriptName"] . "<br />\n";
    ?>      <input type = "checkbox" name = "include_<?php echo $set["scriptName"]; ?>" <?php
      $checked = TRUE;
      if (!isset($_POST["include_{$set["scriptName"]}"])) $checked = FALSE;
      $query = "UPDATE `users` SET `include_{$set["scriptName"]}` = \"" . (($checked) ? "1" : "0") . "\" WHERE `UID` = \"{$userID}\"";
      @mysql_query($query);
      if ($checked) echo "checked ";
    ?>/> Include <?php echo $set["friendlyName"]; ?>?<br />
<?php
    if ($checked) print_set($set);
    echo "after: " . $sets[4]["scriptName"] . "<br />\n";
  }
?>

 

And the output I'm getting is very worrying to me. The echo prior to the foreach statement prints the proper value. However as soon as the first "before" statement is being printed, $sets[4]["scriptName"] is immediately set equivalent to $set["scriptName"]. This happens every loop, meaning that by the time it reaches $sets[4], the last index that $sets[4]["scriptName"] is now reading as $sets[3]["scriptName"].

 

Why is foreach doing this? I've never encountered this before, and as I said it happens immediately when the foreach block is entered. Just in case you were wondering, my print_set function doesn't have any access to the global $sets array, it only takes the parameter for the set to print out.

[monkey_05_06]

Update: I tried just using a for loop instead:

 

  for ($i = 0, $set = $sets[$i]; $i < count($sets); $i++, $set = (($i < count($sets)) ? $sets[$i] : NULL)) {

 

It produced exactly the same results. Why?

 

What in processing this command is causing the $sets array to be modified?

 

Edit: Update Mark II - SOLVED! I was being an idiot. In a <b>PRIOR</b> foreach loop I was doing this:

 

<?php
  foreach ($sets as &$set) {
    // ...
  }
?>

 

So $set was still set as a reference to $sets[4]. D'oh!

 

Simply calling unset($set); after I was done with using it by reference resolved the issue!