全新的PDO数据库操作类php版(仅适用Mysql)
2024-05-04 22:28:26
供稿:网友
代码如下:
/**
* 作者:胡睿
* 日期:2012/07/21
* 电邮:hooray0905@foxmail.com
*/
class HRDB{
protected $pdo;
protected $res;
protected $config;
/*构造函数*/
function __construct($config){
$this->Config = $config;
$this->connect();
}
/*数据库连接*/
public function connect(){
$this->pdo = new PDO($this->Config['dsn'], $this->Config['name'], $this->Config['password']);
$this->pdo->query('set names utf8;');
//把结果序列化成stdClass
//$this->pdo->setAttribute(PDO::ATTR_DEFAULT_FETCH_MODE, PDO::FETCH_OBJ);
//自己写代码捕获Exception
$this->pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
}
/*数据库关闭*/
public function close(){
$this->pdo = null;
}
public function query($sql){
$res = $this->pdo->query($sql);
if($res){
$this->res = $res;
}
}
public function exec($sql){
$res = $this->pdo->exec($sql);
if($res){
$this->res = $res;
}
}
public function fetchAll(){
return $this->res->fetchAll();
}
public function fetch(){
return $this->res->fetch();
}
public function fetchColumn(){
return $this->res->fetchColumn();
}
public function lastInsertId(){
return $this->res->lastInsertId();
}
/**
* 参数说明
* int $debug 是否开启调试,开启则输出sql语句
* 0 不开启
* 1 开启
* 2 开启并终止程序
* int $mode 返回类型
* 0 返回多条记录
* 1 返回单条记录
* 2 返回行数
* string/array $table 数据库表,两种传值模式
* 普通模式:
* 'tb_member, tb_money'
* 数组模式:
* array('tb_member', 'tb_money')
* string/array $fields 需要查询的数据库字段,允许为空,默认为查找全部,两种传值模式
* 普通模式:
* 'username, password'
* 数组模式:
* array('username', 'password')
* string/array $sqlwhere 查询条件,允许为空,两种传值模式
* 普通模式:
* 'and type = 1 and username like "%os%"'
* 数组模式:
* array('type = 1', 'username like "%os%"')
* string $orderby 排序,默认为id倒序
*/
public function select($debug, $mode, $table, $fields="*", $sqlwhere="", $orderby="tbid desc"){
//参数处理
if(is_array($table)){
$table = implode(', ', $table);
}
if(is_array($fields)){
$fields = implode(', ', $fields);
}
if(is_array($sqlwhere)){
$sqlwhere = ' and '.implode(' and ', $sqlwhere);
}
//数据库操作
if($debug === 0){
if($mode === 2){
$this->query("select count(tbid) from $table where 1=1 $sqlwhere");
$return = $this->fetchColumn();
}else if($mode === 1){
$this->query("select $fields from $table where 1=1 $sqlwhere order by $orderby");
$return = $this->fetch();
}else{
$this->query("select $fields from $table where 1=1 $sqlwhere order by $orderby");