curl options constants have duplicated INTEGER values

I'm running PHP 5.2.9-1 for Windows and am seeing something that strikes me
rather odd in the curl setopt constants, collisions of sorts I guess you
might call them. The sample script below says it all ...

$curl = get_defined_constants(true);
$curl = $curl['curl'];
foreach($curl as $k => $v) {
if (strpos($k, 'CURLOPT_', 0) === false) {
unset($curl[$k]);
}
}
print count($curl) . "\n";
print_r($curl);
/**
2 dupes, 10009 and 10026
[CURLOPT_READDATA] => 10009
[CURLOPT_INFILE] => 10009
[CURLOPT_SSLKEYPASSWD] => 10026
[CURLOPT_SSLCERTPASSWD] => 10026
*/

I'm retrieving just the CURLOPT_* constants and was not expecting to see
duplicate integer values here. CURLOPT_READDATA is not documented in the
online manual. I can read into that value somewhat and assume that either
constant (CURLOPT_READDATA or CURLOPT_INFILE) might suggest that the value
supplied should be "The file that the transfer should be read from when
uploading"

However, the SSL constants don't make sense. I don't see how they could be
"interchangeable" like the first set.

Anybody have any further insight?



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