Connect to LDAP anonymously or with a uid/pass combo

<?php
// basic sequence with LDAP is connect, bind, search, interpret search
// result, close connection
 
// using ldap bind
$ldaprdn  = 'userid';     // ldap rdn or dn
$ldappass = 'password';  // associated password
 
echo "<h3>LDAP query test</h3>";
echo "Connecting ...";
// connect to ldap server
$ldapconn = ldap_connect("server_address")
    or die("Could not connect to LDAP server.");
// Set some ldap options for talking to
    ldap_set_option($ldapconn, LDAP_OPT_PROTOCOL_VERSION, 3);
    ldap_set_option($ldapconn, LDAP_OPT_REFERRALS, 0);
 
echo "connect result is " . $ldapconn . "<br />";
 
if ($ldapconn) { 
    echo "Binding ..."; 
    $r=ldap_bind($ldapconn,$ldaprdn,$ldappass);     // this is an "anonymous" bind, typically
                           // read-only access
    echo "Bind result is " . $r . "<br />";
 
    echo "Searching for (sn=S*) ...";
    // Search surname entry
    $sr=ldap_search($ldapconn, "dc=lakecoe,dc=org", "sn=*");  
    echo "Search result is " . $sr . "<br />";
 
    echo "Number of entires returned is " . ldap_count_entries($ldapconn, $sr) . "<br />";
 
    echo "Getting entries ...<p>";
    $info = ldap_get_entries($ldapconn, $sr);
    echo "Data for " . $info["count"] . " items returned:<p>";
	echo print_r($info[0]);
    /*for ($i=0; $i<$info["count"]; $i++) {
        //echo "dn is: " . $info[$i]["dn"] . "<br />";
        echo "first cn entry is: " . $info[$i]["cn"][0] . "<br />";
        echo "first email entry is: " . $info[$i]["mail"][0] . "<br /><hr />";
    }*/
 
    echo "Closing connection";
    ldap_close($ldapconn);
 
} else {
    echo "<h4>Unable to connect to LDAP server</h4>";
}
?>