By default, Windows PHP does not include PHP LDAP (php_ldap.dll) as part of their configuration.

And when you check phpinfo(), you will see the PHP ldap extension only under CURL.

To enable PHP LDAP (php_ldap.dll) in Windows Azure, you must follow these steps:

1. Download a non-thread safe V9 version of PHP from php.net (PHP 5.4.x) and locate the php_ldap.dll from the etc folder (or download php_ldap.dll, php 5.4.34 PHP LDAP php_ldap.dll).
2. Create new folder call bin at the root of your Azure website.
   
3. Upload the PHP LDAP file (php_ldap.dll) to the newly created bin folder.
4. In Azure, add a new App Setting
   • key: PHP_EXTENSIONS
   • value: /home/bin/php_ldap.dll

   

5. Click Save.

Now you will see in phpinfo() that LDAP is supported.