php中mysql模块部分功能的简单封装
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<div class="codetitle"><a style="CURSOR: pointer" data="97524" class="copybut" id="copybut97524" onclick="doCopy('code97524')"> 代码如下:
<div class="codebody" id="code97524">
class
MysqL {
private $db; // datebase connect
private $result; //
MysqL result
static private $
MysqL; //
MysqL object
private function __construct()
{ // The work before Create an object
$this->db =
MysqL_connect('localhost','root','');
MysqL_select_db('hello',$this->db );
}
public static function getObject()
{ //if have a object,return that object,Not create
if(! self::$
MysqL instanceof self)
self::$
MysqL = new self;
return self::$
MysqL;
}
public function query($
sql)
{
$this->result =
MysqL_query($
sql,$this->db);
return $this->result;
}
public function fetch()
{
if( isset($this->result ) )
return
MysqL_fetch_assoc( $this->result );
}
public function error()
{
return 'error:'.
MysqL_error();
}
public function num() // for
sql select result
{
return
MysqL_num_rows( $this->result );
}
public function close()
{ // return true or false
return
MysqL_close( $this->db );
}
}
