Number Of Days Between Two Dates

I have spent forever trying to figure this out.. There has to be a simple way. My dates are in the format m-d-y

06-22-07

I want to know the number of days between 05-23-07 and 06-22-07. this should equal 30. I am trying to figure out how to get that with PHP.



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Calculate Number Of Days Between 2 Dates

How can I calculate the number of days between 2 dates in PHP?

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<?php
$digest_date = "2010-04-05";
$todaysdate = "2010-04-19";
$date_diff = round( abs(strtotime($todaysdate))-strtotime($digest_date)) / 86400, 0 ));
echo "$date_diff";
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There may be an easier way of doing it all together and I wouldn't be at all surprised if there were other problems with my script. Here's the snipet:

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// below is the line it times out on.
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[code]......

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for ($dayval = $startdate; $dayval <=$enddate; $dayval+=$oneday){
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if(date(w,$dayval)==0){
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