<?php
// File name:	newsn.inc.php
// Description:	PHP subroutine to generate a new random serial number
// Date:	2002-04-17
// Author:	imacat <imacat@pristine.com.tw>
// Copyright:	Copyright (C) 2002-2007 Pristine Communications

// Set the include path
if (!defined("INCPATH_SET")) {
    require_once dirname(__FILE__) . "/incpath.inc.php";
}
// Referenced subroutines
require_once "monica/sql.inc.php";

// new_sn: Generate a new random serial number for an SQL table
function new_sn($table)
{
    // S/N is always 9 digits
    do {
        // Generate a random serial number
        $sn = mt_rand(100000000, 999999999);
        // Check if this serial number exists
        $select = "SELECT sn FROM $table WHERE sn=$sn;\n";
        $result = sql_query($select);
    } while (sql_num_rows($result) > 0);
    return $sn;
}

// new_sn_assoc: Generate a new random serial number for an associative array
function new_sn_assoc(&$assoc)
{
    // S/N is always 9 digits
    do {
        // Generate a random serial number
        $sn = mt_rand(100000000, 999999999);
    } while (array_key_exists($sn, $assoc));
    return $sn;
}

?>