How to get data to press default=? output

Source: Internet
Author: User
How do I make the data output when I press default=?
$PD _id is an array
foreach ($pd _id as $pkey = + $pvalue) {
Echo $pvalue;
Echo $pkey;
}
?>

How to set up to contain default, and when default=2, output 2 digits per line.

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Where does default come from and where to go?


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I really don't know what he's talking about ...
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Brother, Careless Wow!default in that lump ah!
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This means that if the effect shown on the page is
14441 15341 24054 24066 24078 24070

How to set a piece of code, to use the default, that is, when default=2, the effect is
1441 15341
24054 24066
24078 24070

When default=3, the effect is
14441 15341 24054
24066 24078 24070

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