LDAP support in PHP is not enabled by default. You
will need to use the –with-ldap[=DIR] configuration option
when compiling PHP to enable LDAP support. DIR is the LDAP base
install directory. To enable SASL support, be sure –with-ldap-sasl[=DIR] is used, and
that sasl.h exists on the system.
Note: Note to Win32
In order for this extension to work, there are
DLL files that must
be available to the Windows system PATH.
For information on how to do this, see the FAQ entitled “How
do I add my PHP directory to the PATH on Windows“. Although
copying DLL files from the PHP folder into the Windows system
directory also works (because the system directory is by default in
the system’s PATH), this is not
recommended. This extension requires the
following files to be in the PATH:
libeay32.dll and ssleay32.dll, or, as of OpenSSL 1.1 libcrypto-*.dll and libssl-*.dll
In order to use Oracle LDAP libraries, proper
environment has to be set.