<?php
include "db.php";

$results = db_query("SELECT * FROM classes ORDER BY school_num, sequence");
while ($row = db_fetch_array($results)) {
   extract($row);

   if ($teacher1 > 0) {
      db_query("UPDATE people SET class_num = $record_num WHERE school_num = $school_num AND record_num = $teacher1 AND class_num = 0");
   }

   if ($teacher2 > 0) {
      db_query("UPDATE people SET class_num = $record_num WHERE school_num = $school_num AND record_num = $teacher2 AND class_num = 0");
   }

   if ($teacher3 > 0) {
      db_query("UPDATE people SET class_num = $record_num WHERE school_num = $school_num AND record_num = $teacher3 AND class_num = 0");
   }
}

?>