the script goes as follows:

<?php
  $spojeni = ibase_connect($host,"guest","guest");
  $vys = ibase_query("select * from vyrobky;", $spojeni);
  $i = 0;
  while ($sql = ibase_fetch_object($vys)) {
      echo "  <TR>\n    <TD><B>".++$i.".</B></TD>\n";
      echo "    <TD>".$sql->JMENO."</TD>\n";
      echo "    <TD>".$sql->VYROBCE."</TD>\n";
      echo "    <TD>&nbsp;</TD>\n";
      echo "    <TD>&nbsp;</TD>\n  </TR>";
  }
  ibase_close($spojeni);
?>

When the script finishes, connection will stay opened. I also tried to call ibase_close without parametrs but with the same result. I found this because my Interbase server crashes after opening the page 32 times and thus making 32 connections - I didn't figure out yet why 32, but it might be because of some IB setting. It's probably not fault of PHP. 

When I connect over ODBC, everything is going fine. Error is probably in php-interbase.dll.

I am running PHP 4.0.2 on PWS 4.0 on Win98. My Interbase server is WI-V6.0.0.627

If you need more info - PHPInfo() could be found on maschina.buk.cvut.cz/info.php - the computer doesn't run all the time, but most of day it does.

Thanx, Jan Antos.
P.S. otherwise, PHP is great, many thanks to all, who develop it!