<?php
//!function_exists('readover') && exit('Forbidden');

Class DB {
	var $query_num = 0;

	function DB($dbhost, $dbuser, $dbpw, $dbname, $pconnect = 0) {
		$this->connect($dbhost, $dbuser, $dbpw, $dbname, $pconnect);
	}

	function connect($dbhost, $dbuser, $dbpw, $dbname, $pconnect = 0) {
		if($pconnect==1 && !@mysql_pconnect($dbhost, $dbuser, $dbpw)){

			$this->halt("Pconnect to MySQL ($dbhost,$dbuser) failed");
		}elseif(!@mysql_connect($dbhost, $dbuser, $dbpw)){

			$this->halt("Connect to MySQL ($dbhost,$dbuser) failed");
		}
		if($dbname) {
			if (!@mysql_select_db($dbname)){
				$this->halt('Cannot use database '.$dbname);
			}
		}

	}

	function close() {
		return mysql_close();
	}

	function select_db($dbname){
		if (!@mysql_select_db($dbname)){
			$this->halt('Cannot use database '.$dbname);
		}
	}

	function query($SQL, $method='') {
		//$GLOBALS['PW']=='pw_' or $SQL=str_replace('pw_',$GLOBALS['PW'],$SQL);
		if($method=='U_B' && function_exists('mysql_unbuffered_query')){
			$query = mysql_unbuffered_query($SQL);
		}else{
			$query = mysql_query($SQL);
		}
		//$this->query_num++;
		
		//echo $SQL.'<br>'.$this->query_num.'<br>';
		if (!$query)  $this->halt('Query Error: ' . $SQL);
		return $query;
	}

	function get_one($SQL){

		$query=$this->query($SQL,'U_B');
		
		$rs =& mysql_fetch_array($query, MYSQL_ASSOC);

		return $rs;
	}

	function update($SQL) {
		$GLOBALS['PW']=='pw_' or $SQL=str_replace('pw_',$GLOBALS['PW'],$SQL);
		if($GLOBALS['db_lp']==1){
			if(substr($SQL,0,7)=='REPLACE'){
				$SQL=substr($SQL,0,7).' LOW_PRIORITY'.substr($SQL,7);
			} else{
				$SQL=substr($SQL,0,6).' LOW_PRIORITY'.substr($SQL,6);
			}
		}
		if(function_exists('mysql_unbuffered_query')){
			$query = mysql_unbuffered_query($SQL);
		}else{
			$query = mysql_query($SQL);
		}
		$this->query_num++;
		
		//echo $SQL.'<br>'.$this->query_num.'<br>';

		if (!$query)  $this->halt('Update Error: ' . $SQL);
		return $query;
	}

	function fetch_array($query, $result_type = MYSQL_ASSOC) {
		return mysql_fetch_array($query, $result_type);
	}

	function affected_rows() {
		return mysql_affected_rows();
	}

	function num_rows($query) {
		$rows = mysql_num_rows($query);
		return $rows;
	}

	function free_result($query) {
		return mysql_free_result($query);
	}

	function insert_id() {
		$id = mysql_insert_id();
		return $id;
	}

	function halt($msg='') {
		require_once('db_error.php');
		new DB_ERROR($msg);
	}
}
?>