According to the PHP Manual (http://www.php.net/manual/en/install.windows.extensions.php) "PHP <= 4.2.0 requires libsasl.dll (bundled), PHP >= 4.3.0 requires libeay32.dll, ssleay32.dll (bundled)".
I also found this concerning XAMPP where the fix was to move the LIBSASL.DLL out of the php directory to the apache bin directory before enabling the ldap extension (http://www.apac
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