Description:
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PDO::quote() with second parameter PDO::PARAM_INT, quotes an integer like a string.

PS: phpinfo() says:
PHP Version 5.2.6-1+lenny3
Cant it select in your drop-down.

PPS: Your captcha is hard.

Reproduce code:
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$Pdo = new PDO('mysql:host=127.0.0.1', 'root', 'secret');
$Pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
$Pdo->query('USE test');

echo $Pdo->quote(42, PDO::PARAM_INT);

Expected result:
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42

Actual result:
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'42'