使用PHP做移动端 api接口开发方法（适用于TP框架）

1. [代码]使用TP框架时放在common文件夹下文件名就叫function.php

<?php

/*************************** api开发辅助函数 **********************/

/**

* @param null $msg 返回正确的提示信息

* @param flag success CURD 操作成功

* @param array $data 具体返回信息

* Function descript: 返回带参数，标志信息，提示信息的json 数组

*

*/

function returnApiSuccess($msg = null,$data = array()){

$result = array(

'flag' => 'Success',

'msg' => $msg,

'data' =>$data

);

print json_encode($result);

}

/**

* @param null $msg 返回具体错误的提示信息

* @param flag success CURD 操作失败

* Function descript:返回标志信息 ‘Error’，和提示信息的json 数组

*/

function returnApiError($msg = null){

$result = array(

'flag' => 'Error',

'msg' => $msg,

);

print json_encode($result);

}

/**

* @param null $msg 返回具体错误的提示信息

* @param flag success CURD 操作失败

* Function descript:返回标志信息 ‘Error’，和提示信息，当前系统繁忙，请稍后重试；

*/

function returnApiErrorExample(){

$result = array(

'flag' => 'Error',

'msg' => '当前系统繁忙，请稍后重试！',

);

print json_encode($result);

}

/**

* @param null $data

* @return array|mixed|null

* Function descript: 过滤post提交的参数；

*

*/

function checkDataPost($data = null){

if(!empty($data)){

$data = explode(',',$data);

foreach($data as $v){

if((!isset($_POST[$v]))||(empty($_POST[$v]))){

if($_POST[$v]!==0 && $_POST[$v]!=='0'){

returnApiError($v.'值为空！');

}

unset($data);

$data = I('post.');

unset($data['_URL_'],$data['token']);

return $data;

}

/**

* @param null $data

* @return array|mixed|null

* Function descript: 过滤get提交的参数；

*

*/

function checkDataGet($data = null){

if(!empty($data)){

$data = explode(',',$data);

foreach($data as $v){

if((!isset($_GET[$v]))||(empty($_GET[$v]))){

if($_GET[$v]!==0 && $_GET[$v]!=='0'){

returnApiError($v.'值为空！');

}

unset($data);

$data = I('get.');

unset($data['_URL_'],$data['token']);

return $data;

}

2. [代码]查询单个果品详细信息

/**

* 发布模块

*

* 获取信息单个果品详细信息

*

*/

public function getMyReleaseInfo(){

//检查是否通过post方法得到数据

checkdataPost('id');

$where['id'] = $_POST['id'];

$field[] = 'id,fruit_name,high_price,low_price,address,size,weight,fruit_pic,remark';

$releaseInfo = $this->release_obj->findRelease($where,$field);

$releaseInfo['remark'] = mb_substr($releaseInfo['remark'],0,49,'utf-8').'...';

//多张图地址按逗号截取字符串，截取后如果存在空数组则需要过滤掉

$releaseInfo['fruit_pic'] = array_filter(explode(',', $releaseInfo['fruit_pic']));

$fruit_pic = $releaseInfo['fruit_pic'];unset($releaseInfo['fruit_pic']);

//为图片添加存储路径

foreach($fruit_pic as $k=>$v ){

$releaseInfo['fruit_pic'][] = 'http://'.$_SERVER['HTTP_HOST'].'/Uploads/Release/'.$v;

}

if($releaseInfo){

returnApiSuccess('',$releaseInfo);

}else{

returnApiError( '什么也没查到(+_+)！');

}

3. [代码]findRelease() 方法的model

/**

* 查询一条数据

*/

public function findRelease($where,$field){

if($where['status'] == '' || empty($where['status'])){

$where['status'] = array('neq','9');

}

$result = $this->where($where)->field($field)->find();

return $result;

}

4. [代码]app端接收到的数据（解码json之后：json_decode();）

{

"flag": "success",

"message": "",

"responseList": {

"id": "2",

"fruit_name": "苹果",

"high_price": "8.0",

"low_price": "5.0",

"address": "天津小白楼水果市场",

"size": "2.0",

"weight": "2.0",

"remark": "急需...",

"fruit_pic": [

"http://fruit.txunda.com/Uploads/Release/201508/55599e7514815.png",

"http://fruit.txunda.com/Uploads/Release/201508/554f2dc45b526.jpg"

]

}

5. [代码]app端接收到的数据（原生json串）

{"flag":"success","message":"","responseList":{"id":"2","fruit_name":"\u82f9\u679c","high_price":"8.0","low_price":"5.0","address":"\u5929\u6d25\u5c0f\u767d\u697c\u6c34\u679c\u5e02\u573a","size":"2.0","weight":"2.0","remark":"\u6025\u9700...","fruit_pic":["http:\/\/fruit.txunda.com\/Uploads\/Release\/201508\/55599e7514815.png","http:\/\/fruit.txunda.com\/Uploads\/Release\/201508\/554f2dc45b526.jpg"]}}