浅谈PHP值mysql操作类

php;"> php

/**

• Created by phpStorm.

• User: Administrator

• Date: 2016/6/27

• Time: 18:55

*/

Class Mysqls{

private $table; //表

private $opt;

public function __construct($host,$user,$pwd,$name,$table_names)

{

$this->db=new mysqli($host,$Name); //数据库连接



if(mysqli_connect_errno()){

  echo "数据库连接错误".mysqli_connect_errno();

  exit();

}

$this->db->query("set names utf8");

$this->table=$table_names;

$this->opt['field']="*";

$this->opt['where']=$this->opt['Order']=$this->opt['Limit']=$this->opt['Group']='';

// var_dump($this->opt['where']);

//$this->M($table_names);

}

//数据库连接

// protected function M($table_Name){

// $this->db=new mysqli(DBHOST,DBUSER,DBPWD,DBName);

//

// if(mysqli_connect_errno()){

// echo "数据库连接错误".mysqli_connect_errno();

// exit();

// }

// $this->db->query("set names utf8");

// $this->table=$table_name;

// }

//表中的字段

public function tbField(){

$desc=$this->db->query("DESC {$this->tablE}");

$fieldArr=array();

while(($row=$desc->fetch_assoc())!=falsE){

  $fieldArr[]=$row['Field'];

}

// var_dump($fieldArr);

return $fieldArr;

}

//查询字段

public function field($filed){

//拆分字段

$filedArr=is_String($filed)?explode(",",$filed):$filed;

if(is_array($filedArr)){

  $filed='';

  foreach($filedArr as $v){

    $filed.="'".$v."'".",";

  }

}

//var_dump($filed);

return rtrim($filed,");

}

//判断字段是否存在

public function isfield($fileds)

{

$filedArr=is_String($fileds)?explode(",$fileds):$fileds;

$tbFiled=$this->tbField();

//var_dump( $tbFiled);

foreach($filedArr as $v){

  if(!in_array($v,$tbFiled)){

     echo "字段输入发错";

  }

}

}

//条件语句

public function where($wherE){

 $this->opt['where']=is_String($wherE)?" WHERE {$wherE}":"不是字符串";

return $this;

}

//Limit

public function Limit($limit){

 $this->opt['Limit']=is_String($limit)?" Limit {$limit}":"不是字符串";

return $this;

}

public function Order($order){

 $this->opt['Order']=is_String($order)?" Order By {$order}":"不是字符串";

return $this;

}

public function Group($group){

$this->opt['Group']=is_String($group)?" Group BY {$group}":"不是字符串";

return $this;

}

// 查询字符串

public function SELEct(){

$sql="SELEct * from {$this->tablE} {$this->opt['where']} {$this->opt['Group']} {$this->opt['Limit']} {$this->opt['Order']}";

return $this->fetch($sql);

}

//结果集查询

public function fetch($sql){

$result=$this->db->query($sql);

$sqlarr=array();

while(($row=$result->fetch_assoc())!=falsE){

  $sqlarr[]=$row;

}

// var_dump($sqlarr);

return $sqlarr;

}

//无结果集查询

public function querys($sql){

$sqls=$this->db->query($sql);

return $this->db->affected_rows;

}

//删除语句

public function delete($where=array()){

if($where=="" && empety($this->opt['where'])) die(" 不能为空");

if($where!=""){

  if(is_array($wherE)){

    $where=implode(",$wherE);

  }

  $this->opt['where']=" WHERE id IN({$wherE})";

}

$sql="delete from {$this->tablE} {$this->opt['where']} {$this->opt['Limit']}";

var_dump($sql);

//return $this->query($sql);

}

//数组键名

public function key($key){

if(!is_array($key))die("非法数组");

$keys="";

foreach($key as $v){

  $keys.=$v.",";



}

return rtrim($keys,");

}

//数组值

public function value($value){

if(!is_array($value))die("非法数组");

$strvalue="";

foreach($value as $v){

  $strvalue.="'".$v."'".",";

}

return rtrim($strvalue,");

}

//添加语句

public function add($filed){

if(!is_array($filed)) die("非法数组");

$fileds=$this->key(array_keys($filed)); //返回数组中的键名

//var_dump($fileds);

$values=$this->value(array_values($filed));

$sql="insert into {$this->tablE}({$fileds})VALUES($values)";

//var_dump($sql);

return $this->querys($sql);

}

//查找单条记录

public function find($field,$id){

$sql="SELEct {$this->opt['field']} from {$this->tablE} {$this->where($field.'='."'".$id."'")}";

var_dump($sql);

return $this->fetch($sql);

}

//更新语句

public function save($arrs){

if(!is_array($arrs))die("非法的数组");

//if(empty($this->opt['where']))die("条件不能为空");

$str="";

while(list($k,$v)=each($arrs))

{

  $str="{$k}="."'{$v}',";

}

$str=rtrim($str,");

$sql="update {$this->tablE} set {$str}{$this->opt['where']}";



return $this->querys($sql);

}

//获取总记录数

public function counts(){

$sql="SELEct 'id' from {$this->tablE}{$this->opt['where']}";

//var_dump($sql);

return $this->querys($sql);

}

}

$db=new Mysqls('127.0.0.1','root','','mysql','user');