实例
<?php class Model{ public $link; public $tabName; //链接数据坤 //初始化,构造方法 public function __construct($tabName){ $this->link = mysqli_connect('localhost','root','123456'); if(mysqli_connect_errno($this->link)>0){ echo mysqli_connect_error($this->link);exit; } mysqli_select_db($this->link,'day2'); mysqli_set_charset($this->link,'utf8'); //初始化数据表 $this->tabName = $tabName; } //增 public function add(){ $sql ="INSERT INTO{$this -> tabName} VALUES('写啥?','写啥?','写啥?','写啥?','写啥?')"; $result = mysqli_query($this->link,$sql); if($result && mysqli_affected_rows($this->link)>0){ return true; }else{ return false; } } //删 public function Del(){ $sql = "DELETE FROM {$this -> tabName} WHERE id='2'"; $result = mysqli_query($result,$sql); if($result && mysqli_affected_rows($result)){ return true; }else{ return false; } } public function Update(){ $sql = "UPDATE {$this -> tabName} SET name='',age='',city='',sex='' WHERE id='22'" ; $result = mysqli_query($this->link,$sql); if($result&& mysqli_affected_rows($result)){ return true; }else{ return false; } } //查 public function Select(){ $sql = "SELECT * FROM {$this -> tabName}"; $result = mysqli_query($this->link,$sql); if($result && mysqli_num_rows($result)>0){ $userlist = array(); while($row = mysqli_fetch_assoc($result)){ $userlist[] = $row; } } return $userlist; } //析构 public function __destruct(){ mysqli_close($this->link); } } $a = new Model('info'); //查询办法 $userlist = $a->Select(); var_dump($userlist);
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