Description:
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This is a duplicate of http://bugs.php.net/bug.php?id=29534 which is 4.5 years old now.  The comment 3 years ago was that the XML docs had been updated, but the current PHP doc page for define still shows that "only scalar and null values are allowed. Scalar values are integer, float, string or boolean values."  This is still wrong.  Either the docs need to be updated to indicate resources are allowed, or PHP needs to be updated to throw an error when a resource is define()d.

Reproduce code:
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From manual page: function.define
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<?php
$f = fopen(__FILE__,"r");
define('x',$f);
fclose($f);
$g = fread(x,400);
echo $g;
echo x;
echo constant('x');

Expected result:
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some sort of error

Actual result:
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the program prints out itself (because I'm read the fopen of __FILE__)