Did you google it? That brings up Net::LDAP, which is fairly actively developed and has lots of good reviews. The documentation begins with some example code:

use Net::LDAP;
 
$ldap = Net::LDAP->new( 'ldap.bigfoot.com' ) or die "$@";

$mesg = $ldap->bind( 'cn=root, o=University of Michigan, c=us',
                     password => 'secret'
                   );
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