How do I remove empty elements from an array and then re-index the keys (if that's what they're called?)

Hi,

If have an array $_SESSION['finalHTML'] which when I execute the following code:

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print_r ( $_SESSION['finalHTML'] );
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outputs the following:

Array ( [1] =>lemons[2] =>apples[7] =>plums[8] => [9] => [10] =>banana)

I need to do two things to this array:

1) Firstly I need to remove the empty elements (in this case they are 8 & 9 but this will vary depending on where my scripts at:

e.g. Array ( [1] =>lemons[2] =>apples[7] =>plums[10] =>banana)

2) and now I need my array to be re-indexed so it's set up as follows:

Array ( [1] =>lemons[2] =>apples[3] =>plums[4] =>banana)

What two functions do I need to use to do this?

Thanks as always
James :-)