db.class.php 主要方法
<?php /** * 数据库配置信息 */ define(‘DB_HOST‘,‘127.0.0.1‘); //服务器 define(‘DB_USER‘,‘root‘); //数据库用户名 define(‘DB_PASSWORD‘,‘123456‘); //数据库密码 define(‘DB_NAME‘,‘TEST‘); //默认数据库 define(‘DB_CHARSET‘,‘utf8‘); //数据库字符集 define(‘TIMEZONE‘,"PRC"); //时区设置 date_default_timezone_set(TIMEZONE); /** * 类名：DB * 说明：数据库操作类 */ class DB { public $host; //服务器 public $username; //数据库用户名 public $password; //数据密码 public $db_name; //数据库名 public $conn; //数据库连接变量 /** * DB类构造函数 */ public function DB($host=DB_HOST ,$username=DB_USER,$password=DB_PASSWORD,$db_name=DB_NAME) { $this->host = $host; $this->username = $username; $this->password = $password; $this->db_name = $db_name; } /** * 打开数据库连接 */ public function open() { $this->conn = mysql_connect($this->host,$this->username,$this->password)or die (‘数据库连接失败！</br>错误原因：‘.mysql_error()); mysql_select_db($this->db_name)or die(‘数据库选定失败！</br>错误原因：‘.mysql_error()); mysql_query("SET CHARACTER SET utf8"); } /** * 关闭数据连接 */ public function close() { mysql_close($this->conn); } /** * @description调用方法用 * @param $sql * @return array */ public function QueryAll($sql) { $this->open(); $rs = mysql_query($sql,$this->conn); $objList = array(); while($obj = mysql_fetch_object($rs)) { if($obj) { $objList[] = $obj; } } $this->close(); return $objList; } /** * description查询全部返回Json格式，通讯用 * @param $sql * @return string */ public function QueryAllJson($sql) { echo $sql; $this->open(); $rs = mysql_query($sql,$this->conn); $objList = array(); $i=0; while($obj = mysql_fetch_object($rs)) { $objList[$i]=$obj; $i++; } $this->close(); return json_encode(array("result"=>"success",‘data‘=>$objList)); } /** * @description 插入数据到数据库中 * @param $tableName 表名 * @param array $columns 包含表中所有字段名的数组。默认空数组，则是全部有序字段名 * @param array $values 包含对应所有字段的属性值的数组 * @return int */ public function insertData($tableName,$columns=array(),$values=array()) { $sql = ‘insert into ‘.$tableName .‘( ‘; for($i = 0; $i < sizeof($columns);$i ++) { $sql .= $columns[$i]; if($i < sizeof($columns) - 1) { $sql .= ‘,‘; } } $sql .= ‘) values ( ‘; for($i = 0; $i < sizeof($values);$i ++) { $sql .= "‘".$values[$i]."‘"; if($i < sizeof($values) - 1) { $sql .= ‘,‘; } } $sql .= ‘ )‘; $this->open(); mysql_query($sql,$this->conn); return true; // $id = mysql_insert_id($this->conn);//取得上一步操作产生的ID(2) // $this->close();(2) // return $id;//(2) } /** * 通过表中的某一属性获取数据 */ public function getDataByAtr($tableName,$atrName,$atrValue){ @$data = $this->QueryAll("SELECT * FROM ".$tableName." WHERE $atrName = ‘$atrValue‘"); if(count($data)!=0)return $data; return NULL; } /** * description_ * 通过表中的"id"，删除记录 */ public function delete($tableName,$atrName,$atrValue){ echo $tableName; $this->open(); $deleteResult = false; if(mysql_query("DELETE FROM ".$tableName." WHERE $atrName = ‘$atrValue‘")) $deleteResult = true; $this->close(); if($deleteResult) return true; else return false; } /** * 更新表中的属性值 */ public function updateParamById($tableName,$atrName,$atrValue,$key,$value){ $db = new DB(); $db->open(); if(mysql_query("UPDATE ".$tableName." SET $key = ‘$value‘ WHERE $atrName = ‘$atrValue‘ ")){ //$key不要单引号 $db->close(); return true; } else{ $db->close(); return false; } } /* * @description: 取得一个table的所有属性名 * @param: $tbName 表名 * @return：字符串数组 */ public function fieldName($tableName){ $resultName=array(); $i=0; $this->open(); $result = mysql_query("SELECT * FROM ".$tableName); while ($property = mysql_fetch_field($result)){ $resultName[$i++]=$property->name; } $this->close(); return $resultName; } }
user.class.php 操作
<?php require_once("./db.class.php"); class User{ /** * description_插入数据到XX * @param $tableName * @param $name * @param $password * @return int */ public function insert($tableName,$name,$password){ $db = new DB(); $resultId = $db->insertData("$tableName",array(‘name‘,‘password‘),array($name,$password)); return $resultId; } /** * @description根据ID或XXX查询一条数据，user所查询的表，id是字段名 * @param $table * @param $name * @param $value * @return array|null */ public static function getUserById($table,$name,$value){ $db = new DB(); return $db->getDataByAtr("$table",‘$name‘,$value); } /** * @description根据name查询一条数据 * @param $name * @return array|null */ public static function getUserByName($name){ $db = new DB(); @$data = $db->QueryAll("SELECT * FROM user WHERE name = ‘".$name."‘"); if(count($data)!=0)return $data; else return null; } /** * @description_获取全部数据，调方法使用 * @param $tableName * @return null */ public static function QueryAll($tableName){ $db = new DB(); @$data = $db->QueryAll("select * FROM"." ".$tableName); if(count($data)!=0) echo $data; else return null; } /** * @description_获取全部数据，通讯使用 * @param $tableName */ public static function QueryAllJson($tableName){ $db = new DB(); @$data = $db->QueryAllJson("SELECT * FROM ".$tableName.""); if(count($data)!=0) echo $data; else echo false; } /** * description分页查询，返回Json格式。通讯用，echo * @param $start * @param $count */ public static function QueryWithPage($start,$count){ $db = new DB(); @$data = $db->QueryAllJson("select id,name,password from user order by id limit"." ".$start.",".$count); if(count($data)!=0) echo $data; else echo false; } /** * @description_删除数据，根据ID，user是表名，id是.... * @param $tableName * @param $name * @param $value * @return bool */ public static function deleteByUid($tableName,$name,$value){ $db = new DB(); if($db->delete("$tableName","$name",$value)) return true; else return false; } }
test.php 测试
<?php header("Content-Type:text/html; charset=utf8"); require_once("./user.class.php"); $user = new User(); //$user->insert(‘asssss‘); //$user->getUserById(1); //$userA = User::getUserById(1); //$userB = User::QueryWithPage(6,10); //$userB = User::QueryAllJson(‘user‘); //$user=$user->insert(‘user‘,‘www‘,‘sd‘); //$userB = User::deleteByUid(‘user‘,‘id‘,7); //foreach ($user as $u) { // echo json_encode(array("result"=>"success","date"=>"asd")); //} //构造函数被注释掉了，如果有构造函数