LDAP and PHP connection failure

Question

I am trying to connect to a secure LDAP server (using LDAPs) via PHP, but I am having problems with it. I get the following error

Warning: ldap_bind()

Answer 1

What saved my day after reading and trying out solutions from allover the web and SO, was to use a ldaps uri without the port specified in it.

So instead of this: ldaps://example.com:636 I had to use this: ldaps://example.com and it now works like a charm.

I was setting this up on Ubuntu 16.04 with PHP7.3 runing through Nginx and php-fpm.

A full code example:

try{
    $ldapUri = "ldaps://example.com";
    $ldapUsername = 'username';
    $ldapPassword = 'password';
    $ldapConn = ldap_connect($ldapUri);
    if($ldapConn){
        ldap_set_option($ldapConn,LDAP_OPT_NETWORK_TIMEOUT,10);

        if(!ldap_set_option($ldapConn,LDAP_OPT_PROTOCOL_VERSION,3)){
           print 'Failed to set ldap protocol to version 3
';
        }
        ldap_set_option($ldapConn, LDAP_OPT_REFERRALS,0);
        $ldapBind = ldap_bind($ldapConn, $ldapUsername, $ldapPass);
        if ($ldapBind) {
           echo "LDAP bind successful...";
           //DO LDAP search and stuff
           ldap_unbind($ldapConn);
        } else {
           echo "LDAP bind failed...";
        }
    }
}catch(Exception $e){
    print($e->getMessage();
}