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"
        }
    ]
}