I'm trying to build a LDAP interface using php but have run into this strange problem. I have installed the php-ldap package using yum on my base php install but whenever I call ldap_connect() it says the function is undefined. Seeing phpinfo() I can verify that the ldap extension is indeed installed and enabled.
Are you sure you have openldap included?
I just realized I have the same issue where phpinfo shows me several other ldap modules loaded by apache, but I do no have openldap
http://www.php.net/manual/en/ldap.installation.php
I just got a successful install following the directions here: http://www.aoddy.com/2009/01/18/how-to-install-php-ldap-module-on-centos5/
Instructions from link:
yum install php-ldapvi /etc/php.ini- add
extension=ldap.so
- add
service httpd restart
来源：https://stackoverflow.com/questions/14894266/using-php-ldap-in-centos-6-3