What could be the problem with this array?

Question

This is the source $pData array I have:

Array
(
    [code] => 105132
    [globalImages] => Array
        (
            [0] => 1148-1578-image_41ddeeef69eb94a8d9ccc1503d099810.jpg
        )

    [envImages] => Array
        (
            [0] => 1148-0-image_72e95c6424ec7bcd90994f1c0a3f4544.jpg
        )

    [attribs] => Array
        (
            [0] => Array
                (
                    [0] => Array
                        (
                            [id] => 1578
                            [uniqCode] => 105132-1578
                            [parentId] => 0
                            [type] => Colour
                        )
                )
        )
)

When I call a value using the following (line 337):

<?php echo strtolower($pData['attribs'][0][0]['type']);?>

PHP Error log has the following line:

[13-Jan-2010 11:48:21] PHP Notice:  Undefined offset: 0 in D:\apps\path\to\file\pages\product.php on line 337

What could I be doing wrong? As far as I see, there is nothing wrong with this simple call. May be someone see something fishy?

Thanks for any input!

EDIT 01:

I forgot to say that the echo produces correct result. But it also makes the specified entry entry in the error log.

The var_dump($pData['attribs']) output:

array(1) {
  [0]=>array(2) {
    [0]=>array(22) {
      ["id"]=>string(4) "1578"
      ["uniqCode"]=>string(11) "105132-1578"
      ["parentId"]=>string(1) "0"
      ["type"]=>string(6) "Colour"
      ["title"]=>string(5) "Beech"
      ["swatch"]=>string(22) "variant-437-swatch.jpg"
      ["width"]=>string(4) "1830"
      ["depth"]=>string(3) "610"
      ["height"]=>string(3) "740"
      ["floorToSeat"]=>string(1) "0"
      ["unit"]=>string(2) "mm"
      ["weight"]=>float(89)
      ["volume"]=>float(2.311)
      ["groupPack"]=>int(1)
      ["fobkl"]=>string(3) "407"
      ["br3"]=>string(3) "441"
      ["br2"]=>string(3) "467"
      ["br1"]=>string(3) "496"
      ["rcp"]=>string(3) "515"
      ["gwm"]=>string(3) "592"
      ["gem"]=>string(3) "618"
      ["images"]=>array(1) {
        [0]=>string(52) "1148-1578-image_41ddeeef69eb94a8d9ccc1503d099810.jpg"
      }
    }
    [1]=>array(22) {
      ["id"]=>string(4) "1577"
      ["uniqCode"]=>string(11) "105132-1577"
      ["parentId"]=>string(1) "0"
      ["type"]=>string(6) "Colour"
      ["title"]=>string(13) "Natural Maple"
      ["swatch"]=>string(22) "variant-436-swatch.jpg"
      ["width"]=>string(4) "1830"
      ["depth"]=>string(3) "610"
      ["height"]=>string(3) "740"
      ["floorToSeat"]=>string(1) "0"
      ["unit"]=>string(2) "mm"
      ["weight"]=>float(155.06)
      ["volume"]=>float(20.305)
      ["groupPack"]=>int(1)
      ["fobkl"]=>string(3) "407"
      ["br3"]=>string(3) "441"
      ["br2"]=>string(3) "467"
      ["br1"]=>string(3) "496"
      ["rcp"]=>string(3) "515"
      ["gwm"]=>string(3) "592"
      ["gem"]=>string(3) "618"
      ["images"]=>array(1) {
        [0]=>string(52) "1148-1577-image_9c4fc8337e5c106ea6b69863e68f54bb.jpg"
      }
    }
  }
}

Answer 1

Do your print_r on the row just before the echo, so you are sure that you see the array that your function actually work on. It could be a scoping problem (i.e., $pData is a local array in a function and you call echo outside that funtion).

Answer 2

I can't see anything wrong - the only possibility is that you defined one or both of the 0 keys as a string '0', making it an associative index (rather than numeric)

$pData['attribs']['0']['0']['type'] = 'Colour';

In which case you'd also need to refer to it as a string

Answer 3

Did assemble this Array by hand? If I remember correctly, strings should be wrapped in quotes. So you have a type problem here. For example the word 'Colour' should be wrapped.

Answer 4

A debugger can help to find the error, e.g. xdebug and netbeans as frontend.

Please verify that the source line in question really is echo strtolower($pData['attribs'][0][0]['type']), e.g. by using an error handler like:

function myErrorHandler($errno, $errstr, $errfile, $errline, $errcontext)
{
  if ( E_NOTICE===$errno && is_readable($errfile) ) {
    $source = file($errfile);
    for($i=max(0,$errline-4); $i<$errline+3; $i++ ) {
      if ( isset($source[$i]) ) {
        if ( $i+1===$errline ) {
          echo ' >>> ';
        }
        echo $source[$i];
      }
    }
  }

  return false;
}
$old_error_handler = set_error_handler('myErrorHandler');