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13 years ago
Results from ActiveDirectory may be ordered by objectSid.
We can get all users for each page size by modify filter.

<?php
// ... connect to ldap
$lastsid='';
while (1) {
    $filter = '(objectClass=user)';
    if (strlen($lastsid)) {
        list($v)=array_values(unpack('V',substr($lastsid,24))); // id for user.
        $s = substr($lastsid,0,24).pack('V',1+$v); // next sid.
        $s = preg_replace('/../','\\\\$0',bin2hex($s)); // escape for fiter
        $filter = '(&'.$filter.'(objectSid>='.$s.'))'; // fiter for next entries.
    }
    $res = ldap_search($ldap,$basedn,$filter,array('objectSid','cn'));
    if (!ldap_count_entries($ldap,$res)) {
        break;
    }
    for ($ent=ldap_first_entry($ldap,$res); $ent; $ent=ldap_next_entry($ldap,$ent)) {
        list($lastsid) = ldap_get_values_len($ldap,$ent,'objectSid');
    }
}
?>
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