本文实例讲述了PHP基于ORM方式操作MySQL数据库。分享给大家供大家参考，具体如下：
ORM----Oriented Relationship Mapper，即用面向对象的方式来操作数据库。归根结底，还是对于SQL语句的封装。
首先，我们的数据库有如下一张表：
我们希望能够对这张表，利用setUserid("11111")，即可以设置userid；getUserid()既可以获得对象的userid。所以，我们需要建立model对象，与数据库中的表对应。
由于每张表所对应的model都应该是有set/get操作，所以，我们用一个父类BasicModel进行定义。其他model都是继承至这个model。
BasicModel的代码如下：
<"htmlcode"><"BasicModel.php"); class TbUser extends BasicModel{ } "htmlcode"><"htmlcode"><"IBasicDAO.php"); class BasicDAO implements IBasicDAO{ protected $modelName = null; private $tableName = null; private $h = "localhost"; private $user = "root"; private $pass = "root"; private $db = "db_toilet"; //获得连接 public function getConnection(){ $conn = mysqli_connect($this->h,$this->user,$this->pass,$this->db); return $conn; } //初始化 public function init() { //根据model的名字得到表的名字 $this->tableName = strtolower(substr($this->modelName,0,2))."_".strtolower(substr($this->modelName,2)); } //获得一个表的列名 public function getColumn($tableName) { $sql = "show columns from ".$tableName; $conn = $this->getConnection(); $columns = array(); if($conn!=null){ $rtn = mysqli_query($conn,$sql); while($rtn!==false&&($row=mysqli_fetch_array($rtn))!=null){ $columns[] = $row[0]; } mysqli_close($conn); } return $columns; } //条件查询 public function findByWhere($where){ //获得数据表的列名 $columns = $this->getColumn($this->tableName); //拼接sql语句 $sql = "select * from ".$this->tableName." where ".$where; $conn = $this->getConnection(); $arr = array(); if($conn!=null){ $rtn = mysqli_query($conn,$sql); while($rtn!==false&&($row=mysqli_fetch_array($rtn))!=null){ $index = -1; $obj = new $this->modelName(); foreach($columns as $column){ $obj->{"set".ucfirst($column)}($row[++$index]); } $arr[] = $obj; } mysqli_close($conn); } return $arr; } //分页查询；支持排序 public function findWhereOrderBy($where,$order,$start=null,$limit=null){ //获得数据表的列名 $columns = $this->getColumn($this->tableName); //拼接sql语句 $sql = "select * from ".$this->tableName." where ".$where." order by ".$order; if($start!=null&&$limit!=null){ $sql .= "limit ".$start.",".$limit; } $conn = $this->getConnection(); $arr = array(); if($conn!=null){ $rtn = mysqli_query($conn,$sql); while($rtn!==false&&($row=mysqli_fetch_array($rtn))!=null){ $index = -1; $obj = new $this->modelName(); foreach($columns as $column){ $obj->{"set".ucfirst($column)}($row[++$index]); } $arr[] = $obj; } mysqli_close($conn); } return $arr; } //保存操作 public function save($obj){ $columns = $this->getColumn($this->tableName); $conn = $this->getConnection(); $tag = false; if($conn!=null){ $sql = "insert into ".$this->tableName."("; foreach($columns as $column){ $sql .= $column.","; } $sql = substr($sql,0,strlen($sql)-1).") values("; foreach($columns as $column){ $value = $obj->{"get".ucfirst($column)}(); //判断$value的类型 if($value==null){ $sql .= "null,"; }else if(preg_match("/^[0-9]*$/", $value)){ //是数字 $sql .= $value.","; }else{ $sql .= "'".$value."',"; } } $sql = substr($sql,0,strlen($sql)-1); $sql .= ")"; //执行sql语句 mysqli_query($conn,$sql); $tag = true; mysqli_close($conn); } return $tag; } //删除操作 public function delete($obj){ $conn = $this->getConnection(); $tag = false; if($conn!=null){ $sql = "delete from ".$this->tableName." where "; $columns = $this->getColumn($this->tableName); $value = $obj->{"get".ucfirst($columns[0])}(); if($value!=null){ //是数字 if(preg_match("/^[0-9]*$/", $value)){ $sql .= $columns[0]."=".$value; }else{ $sql .= $columns[0]."='".$value."'"; } //执行 mysqli_query($conn,$sql); $tag = true; } mysqli_close($conn); } return $tag; } //更新操作 public function update($obj){ $conn = $this->getConnection(); $columns = $this->getColumn($this->tableName); $tag = false; if($conn!=null){ $sql = "update ".$this->tableName." set "; for($i=1;$i<count($columns);$i++){ $column = $columns[$i]; $value = $obj->{"get".ucfirst($columns[$i])}(); if($value==null){ $sql .= $column."=null,"; }else if(preg_match("/^[0-9]*$/",$value)){ $sql .= $column."=".$value.","; }else{ $sql .= $column."='".$value."',"; } } $sql = substr($sql,0,strlen($sql)-1); $sql .= " where "; $tempColumn = $columns[0]; $tempValue = $obj->{"get".ucfirst($columns[0])}(); if(preg_match("/^[0-9]*$/", $tempValue)){ $sql .= $tempColumn."=".$tempValue; }else{ $sql .= $tempColumn."='".$tempValue."'"; } //执行操作 mysqli_query($conn,$sql); $tag = true; mysqli_close($conn); } return $tag; } } "TbUser"，代码就得知操作的表为tb_user，然后就可以进行一系列操作了。<"BasicDAO.php"); require_once("../model/TbUser.php"); class TbUserDAO extends BasicDAO{ function TbUserDAO(){ $this->modelName = 'TbUser'; parent::init(); } } "htmlcode">$tbUserDAO = new TbUserDAO(); $tbUser = new TbUser(); $tbUser->setUserid("fetchingsoft@163.com"); $tbUser->setUsername("fetching"); $tbUserDAO->update($tbUser); echo "执行成功！"; print_r($list);这样对数据库中的记录进行更新。
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