<?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");
}
}
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