php class _Construct empty - php

Question

<?
session_start();
/*
echo $_SESSION['SQLIP'];
echo "<br>";
echo $_SESSION['SQLDB'];
echo "<br>";
echo $_SESSION['SQLUSER'];
echo "<br>";
echo $_SESSION['SQLPASS'];
echo "<br>";
*/
class DB_MSSQL {
private $Host;
private $Database;
private $User;
private $Password;
public $Link_ID = 0;
public $Query_ID = 0;
public $Record = array();
public $Row = 0;
public $Errno = 0;
public $Error = "";
public $Halt_On_Error = "yes";
public $Auto_Free = 1;
public $PConnect = 0;
public function _construct(){
$this->Host = $_SESSION['SQLIP'];
$this->Database = $_SESSION['SQLDB'];
$this->User = $_SESSION['SQLUSER'];
$this->Password = $_SESSION['SQLPASS'];
}
function DB_MSSQL($query = "") {
if($query) {
$this->query($query);
}
}
function connect() {
if ( 0 == $this->Link_ID ) {
if(!$this->PConnect) {
$this->Link_ID = mssql_connect($this->Host, $this->User, $this->Password);
} else {
$this->Link_ID = mssql_pconnect($this->Host, $this->User, $this->Password);
}
if (!$this->Link_ID)
$this->connect_failed("connect ($this->Host, $this->User, \$Password) failed");
else
if (!mssql_select_db($this->Database, $this->Link_ID)) {
$this->connect_failed("cannot use database ".$this->Database);
}
}
}
function connect_failed($message) {
$this->Halt_On_Error = "yes";
$this->halt($message);
}
function free_result(){
mssql_free_result($this->Query_ID);
$this->Query_ID = 0;
}
function query($Query_String)
{
/* No empty queries, please, since PHP4 chokes on them. */
if ($Query_String == "")
/* The empty query string is passed on from the constructor,
* when calling the class without a query, e.g. in situations
* like these: '$db = new DB_Sql_Subclass;'
*/
return 0;
if (!$this->Link_ID)
$this->connect();
// printf("<br>Debug: query = %s<br>\n", $Query_String);
$this->Query_ID = mssql_query($Query_String, $this->Link_ID);
$this->Row = 0;
if (!$this->Query_ID) {
$this->Errno = 1;
$this->Error = "General Error (The MSSQL interface cannot return detailed error messages).";
$this->halt("Invalid SQL: ");
}
return $this->Query_ID;
}
function next_record() {
if ($this->Record = mssql_fetch_row($this->Query_ID)) {
// add to Record[<key>]
$count = mssql_num_fields($this->Query_ID);
for ($i=0; $i<$count; $i++){
$fieldinfo = mssql_fetch_field($this->Query_ID,$i);
$this->Record[strtolower($fieldinfo->name)] = $this->Record[$i];
}
$this->Row += 1;
$stat = 1;
} else {
if ($this->Auto_Free) {
$this->free_result();
}
$stat = 0;
}
return $stat;
}
function seek($pos) {
mssql_data_seek($this->Query_ID,$pos);
$this->Row = $pos;
}
function metadata($table) {
$count = 0;
$id = 0;
$res = array();
$this->connect();
$id = mssql_query("select * from $table", $this->Link_ID);
if (!$id) {
$this->Errno = 1;
$this->Error = "General Error (The MSSQL interface cannot return detailed error messages).";
$this->halt("Metadata query failed.");
}
$count = mssql_num_fields($id);
for ($i=0; $i<$count; $i++) {
$info = mssql_fetch_field($id, $i);
$res[$i]["table"] = $table;
$res[$i]["name"] = $info->name;
$res[$i]["len"] = $info->max_length;
$res[$i]["flags"] = $info->numeric;
}
$this->free_result();
return $res;
}
function affected_rows() {
// Not a supported function in PHP3/4. Chris Johnson, 16May2001.
// return mssql_affected_rows($this->Query_ID);
$rsRows = mssql_query("Select ##rowcount as rows", $this->Link_ID);
if ($rsRows) {
return mssql_result($rsRows, 0, "rows");
}
}
function num_rows() {
return mssql_num_rows($this->Query_ID);
}
function num_fields() {
return mssql_num_fields($this->Query_ID);
}
function nf() {
return $this->num_rows();
}
function np() {
print $this->num_rows();
}
function f($Field_Name) {
return $this->Record[strtolower($Field_Name)];
}
function p($Field_Name) {
print $this->f($Field_Name);
}
function halt($msg) {
if ("no" == $this->Halt_On_Error)
return;
$this->haltmsg($msg);
if ("report" != $this->Halt_On_Error)
die("Session halted.");
}
function haltmsg($msg) {
printf("<p>Server have a critical error!<br><br><br>We are very sorry for any inconvenience!<br><br>\n", $msg);
printf("<b>MSSQL Error</b>: %s (%s)</p>\n",
$this->Errno,
$this->Error);
}
}
$_php_major_version = substr(phpversion(), 0, 1);
if((4 > $_php_major_version) or !class_exists("DB_Sql"))
{
class DB_Sql extends DB_MSSQL
{
function DB_Sql($query = "")
{
$this->DB_MSSQL($query);
}
}
}
unset($_php_major_version);
?>
I have a question, why on DB_MSSQL my $Host,$Datebase,$User,$Password are empty?
If i test $_SESSIONS Between DB_MSSQL are OK.
Class don't have errors but this variables are empty... and i don't know why..
Can anybody help me?
Thank you verry much!

Answer 1

You have missed one underscore, you should have write :
public function __construct()
It should work like this.