-
-
//by http://bbs.it-home.org - class mySql{
- private $result;
- private $conn;
- public static $hasNew = false;
-
- private __construct(){}
- function __destruct(){
- self::$hasnew=false;
- }
function doNew(){ - if(self::$have_new){
- exit('数据库只能连接一次！');
- }else{
- self::$hasNew=true;
- return new self;
- }
- }
-
- private function connect($host,$user,$password,$dbname,$charset='utf8'){
- $this->conn = mysql_connect($host,$user,$password) or exit('错误码：'.mysql_errno(). '数据库连接失败：'.mysql_error());
- mysql_select_db($dbname,$this->conn) or exit('错误码：'.mysql_errno().'选择数据库失败：'.mysql_error());
- mysql_query("set names $charset",$this->conn);
- }
function query($sql,$buffer=true){ - //mysql_real_escape_string($sql,$this->conn);//特殊字符义
- if($buffer){
- $this->result=mysql_query($sql,$this->conn) or exit('错误码：'.mysql_errno().'sql语句执行失败：'.mysql_error());
- }else{
- $this->result=mysql_unbuffered_query($sql,$this->conn) or exit('错误码：'.mysql_errno().'sql语句执行失败：'.mysql_error());
- }
- }
-
- function getRecord(){
- return mysql_fetch_array($this->result);
- }
-
- function close(){
- mysql_free_result($this->result);
- mysql_close($this->conn);
- }
} -
2、调用示例
-
-
//数据库 - $db_host='localhost';
- $db_user='root';
- $db_pwd='root';
- $db_name='news';
- $charset='utf8';
- $sql="select * from news_base";
$db=mySql::doNew(); - $db->connect($db_host,$db_user,$db_pwd,$db_name,$charset='utf8');
- $db->query($sql);
- while($row=$db->getRecord()){
- echo $row[1].'
';
- }
-
|
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