/*

* 名称：数据库操作类

* 作用：提供数据库操作方法

*/

include_once("database.php");

class Model{

public $field; //字段

public $tab; //表名

public $where; //条件

public $order; //排序方式

public $limit; //限制条件

public $group;

public $aaa;

function __construct($tab) {

$this->hostname=HOST;

$this->user=USER;

$this->pass=PASS;

$this->dbname=DBNAME;

$this->charset=CHAREST; //gb2312 GBK utf8

$this->linkflag=mysql_connect($this->hostname,$this->user,$this->pass);

mysql_select_db($this->dbname,$this->linkflag) or die("数据库连接失败！！！");

mysql_query("set names ".$this->charset);

$this -> tab = $tab;

}

function field($field) {

$this -> field = $field;

return $this;

}

function where($where) {

$this -> where = "where ".$where;

return $this;

}

function aaa($aaa)

{

$this -> aaa = $aaa;

return $this;

}

function order($order) {

$this -> order = "order by ".$order;

return $this;

}

function group($group) {

$this -> group = " group by ".$group;

return $this;

}

function limit($limit) {

$this -> limit = "limit ".$limit;

return $this;

}

function select($all="") {

if($all) {

$sql = "select $all from {$this -> tab} order by id";

}else{

$sql = "select {$this -> field} from {$this -> tab} {$this -> where} {$this -> group} {$this -> order} {$this -> limit}";

}

$rst = mysql_query($sql);

/*var_dump($sql);*/

while($row = mysql_fetch_assoc($rst)){

$rows[] = $row;

}

return $rows;

}

//更改数据

function update($post){

foreach ($post as $key=>$val){

$sets[] = "{$key} = '{$val}'";

}

$setstr = "set ".join(",", $sets);

$sql = "update {$this->tab} {$setstr} {$this->where} ";

if(mysql_query($sql)){

return mysql_affected_rows();

}else{

return false;

}

}

//添加插入数据

function insert($post){

foreach($post as $key => $val) {

$keys[] = $key;

$vals[] = "'".$val."'";

}

$keystr = join(",", $keys);

$valstr = join(",", $vals);

$sql = "insert into {$this->tab} ({$keystr}) values ({$valstr})";

if(mysql_query($sql)){

return mysql_insert_id();

}else{

return false;

}

}

//删除数据

function delete(){

$sql = "delete from {$this->tab} {$this->where}";

if(mysql_query($sql)){

return mysql_affected_rows();

}else{

return false;

}

}

//获取表的总行数

function total() {

$sql = "select count(*) from {$this -> tab} {$this->where}";

$rst = mysql_query($sql);

$row = mysql_fetch_row($rst);

return $row[0];

}

}

?>