PHP开发移动客户端接口---封装接口

下面将PHP数据库的增删改查的操作封装成类，方便直接调用：

0.首先是操作的数据库表的结构：

数据库(数据库名称：db_mxd) 以及表(表名称：userInfo)



1. 数据库链接类ConnDb

<?php
/**
* 数据库链接类
*/
class ConnDB{

var $dbType; //数据库的类型
var $host; //数据库服务器的地址
var $userAccount; //链接数据库帐号
var $userPwd; //链接数据库的密码
var $dbName; //链接的数据库名称
var $conn; //链接数据库的标识符

function ConnDB($_dbType, $_host, $_userAccount, $_userPwd, $_dbName)
{
$this->dbType = $_dbType;
$this->host = $_host;
$this->userAccount = $_userAccount;
$this->userPwd = $_userPwd;
$this->dbName = $_dbName;
}

function getConnId()
{
$this->conn = mysql_connect($this->host, $this->userAccount, $this->userPwd)
or die('MySQL Connect Info : '.mysql_error());
mysql_select_db($this->dbName, $this->conn)
or die('Select DB Error Info : '.mysql_error());
return $this->conn;
}

function closeConnId()
{
mysql_close($this->conn);
}
}

?>

2. 数据库操作类AdminDB

<?php
/**
* 数据库操作类
*/
class AdminDB
{
// 操作成功，返回由mysql_query()获得的结果集$result
// 操作失败，返回false
public static function execSQL($sqlStr, $conn)
{
// 首先截取sql语句的前6个字符串，并转换为小些，判断查询类型
$sqlType = strtolower(substr(trim($sqlStr), 0, 6));
$result = mysql_query($sqlStr, $conn);
if($sqlType == "select")
{
if($result)
{
return $result;
}else{
return false;
}
}elseif($sqlStr == "update" || $sqlStr == "delete" || $sqlStr == "insert") {
if($result)
{
return true;
}else{
return false;
}
}
}
}

?>

3.处理结果集的类GetUserInfoUtils

<?php
/**
* 结果集处理类
*/
class GetUserInfoUtils
{

public static function getUserInfosJSON($result)
{
$arr = array(
'code'=>'400',
'message'=>'Select Error'
);

if($result)
{
$data = array();
while($obj_result = mysql_fetch_object($result))
{
array_push($data, $obj_result);
}
$arr['code'] = '200';
$arr['message'] = 'Success';
$arr['data'] = $data;
}else{
$arr['data'] = null;
}
return json_encode($arr);
}

}

?>

-----测试文件：

<?php

require_once "ConnDB.php";
require_once "AdminDB.php";
require_once "GetUserInfoUtils.php";

$connDb = new ConnDB('mysql', '127.0.0.1', 'root', 'root', 'db_mxd');
$conn = $connDb->getConnId(); // 获取数据库链接的标志符
$result  = AdminDB::execSQL("select * from userInfo", $conn); // 获取结果集

$data_json = GetUserInfoUtils::getUserInfosJSON($result);
echo $data_json;

?>

测试结果：

{

"code": "200",

"message": "Success",

"data": [

{

"id": "1",

"userName": "Tom",

"age": "23",

"resume": "A programer",

"userAccount": "1512547107",

"password": "123456"

},

{

"id": "2",

"userName": "Jake",

"age": "100",

"resume": "NO Data!",

"userAccount": "1234567890",

"password": "111111"

},

{

"id": "3",

"userName": "Green",

"age": "30",

"resume": "NO Data!",

"userAccount": "16255387348",

"password": "6662719"

}

]

}