PDO封装增删改查

<?php
class db{

public $table=null;
public $pdo;
public $where=null; //where 条件
public $field=null; //要查询的条件

public function __construct()
{
$this->pdo=new PDO("mysql:host=127.0.0.1;dbname=1611b","root","root");
}

public function fetch(){
return $this->pdo->query("select * from $this->table $this->where")->fetch(PDO::FETCH_ASSOC);

}

public function table($table){
$this->table=$table;
return $this;
}

public function where($where){
$str="where ";
foreach ($where as $k=>$v){
$str.=$k."="."'".$v."'". " and " ;
}
$this->where=rtrim($str," and ");
return $this;
}


public function insert($data){
$k=array_keys($data);
$k=implode($k,',');
$str="";
foreach ($data as $key=>$value){
$str.=","."'".$value."'";
}
$str=substr($str,1);
return $this->pdo->exec("insert into $this->table ($k) values ($str)");


}


public function delect($id){
$str='';
$str1='';
foreach ($id as $k=>$v){
$str.=$k;
foreach ($v as $kk=>$vv){
$str1.=','.$vv;
}
}

$str2=substr($str1,1);

$ids='where '.$str.' in '.'('.$str2.')';
return $this->pdo->exec("delete from $this->table $ids");
}



function update($res){
//修改
$str='';
foreach ($res as $k=>$v){
$str.=','.$k.'='."'".$v."'";
}
$str=substr($str,1);
return $this->pdo->exec("update $this->table set $str $this->where");
}

}
posted @ 2019-07-16 10:08  php毛宏历的博客  阅读(...)  评论(... 编辑 收藏