Constants inside quotes are not printed?

Posted by Lost_in_code on Stack Overflow See other posts from Stack Overflow or by Lost_in_code
Published on 2010-05-30T01:25:22Z Indexed on 2010/05/30 1:32 UTC
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This prints apple:

define("CONSTANT","apple");
echo CONSTANT;

But this doesn't:

echo "This is a constant: CONSTANT";

Why?

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