PHP服務端開發APP接口

2020-03-22 18:43:22

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本篇文章介紹的是關于PHP服務端開發APP接口，現在給大家分享一下，有興趣的朋友可以看一下

一、APP接口簡介

什么是app接口？app接口就是用服務端程序如php寫好的腳本，以供app客戶端請求而獲得數據的一個東西。比如一個商鋪app的首頁，肯定有一些商品列表，那么當你打開這個app時，這個封裝在app里的這個首頁其實會去請求一個遠程php文件如：http://www.example.com/index.php 去獲得需要展示在首頁的商品列表數據。前端工程師拿到這些數據，就會按照特定的設計，將這些內容展示出來了。
接口要實現的目的就是這樣。一個app內部通常需要訪問多個php接口來獲得不同的數據。下面具體講一講接口實現的流程以及實現接口需要的一些核心的技術。

二、PHP接口知識JSON和XML方式封裝通信接口

response.html' target='_blank'>class.php

<?php/** *description 用于返回指定數據格式的類 *@param $code [int] 返回的狀態碼 *@param $message [string] 返回的狀態信息 *@param $data [array] 需要返回的數據 * */class Response{    public function json($code,$message,$data){        $result = array(                "code" => $code,                "message" => $message,                "data" => $data            );        return json_encode($result);    }    public function xml($code,$message,$data){        $result = array(                "code" => $code,                "message" => $message,                "data" => $data            );        header('Content-Type:text/xml');        $xml = "<?xml version='1.0' encoding='UTF-8'?>/n";        $xml .= "<root>";        $xml .= self::encodeXml($result);        $xml .= "</root>";        return $xml;    }    /**     *將數據解析為XML字符串     */    public static function encodeXml($data){        $attr = $xml = "";        foreach($data as $key => $value){                if(is_numeric($key)){                    $attr = " id='{$key}'";                    $key = "item";                }                $xml .= "<{$key}{$attr}>";                $xml .= is_array($value)?self::encodeXml($value):$value;                $xml .= "</$key>";        }        return $xml;    }}

response.class.php是一個最簡單的返回json或XML格式數據的類
下面貼出接口文件代碼：
returndata.php

<?phprequire "response.class.php";    //引入返回信息類//準備返回數據$code = 200;$message = "信息請求成功";$data = array(        "name" => "ruanwnewu",        "sex"  => "1",        "age"  => "28",        "exp" => array(                "2012" => "北京瑞泰新",                "2013" => "兄弟連",                "2014" => "木螞蟻科技"            )    );//實例化response類$response = new Response;//返回數據echo $response -> json($code,$message,$data);

三、實際開發例子

開發三個接口（登錄、注冊、文件上傳），分別完成對應的功能
因為本人不做APP開發，所以在實際的接口測試過程中，運用Firefox瀏覽器的RESTClient擴展模擬APP請求服務和接收數據
（1）登錄、注冊接口的編寫
直接上代碼：

<?phprequire ("../connect_db.php");$action = $_REQUEST["action"];$conn = db_connect();mysql_query("set names 'utf8'");mysql_select_db("FECG");switch ($action){    case 'login':       login();       break;    case 'register':       register();       break;    case 'upload':       upload();       break;    default:       break;}//登錄接口function login(){    $account_name = $_POST["username"];    $password = $_POST["password"];    $result = mysql_query("SELECT * FROM app_account WHERE account_name='".$account_name."'");    if (mysql_num_rows($result) > 0){        $row = mysql_fetch_array($result);        $salt = $row["salt"];        $new_password = md5($password."".$salt);        if ($new_password == $row["password"]){            //登錄成功            $current_time = new DateTime();            $login_time = $current_time -> format('Y-m-d H:i:s');            $result =  mysql_query("UPDATE app_account SET last_lgin_time='".$login_time."' WHERE account_name='".$row['account_name']."'");            $array = array();            $array["account_id"] = $row["account_id"];            $array["account_name"] = $row["account_name"];            $array["create_time"] = $row["creat_time"];            $json = json_encode(array(                  "resultCode"=>200,                  "message"=>"login successed!",                  "data"=>$array));            echo($json);        }else{            $json = json_encode(array(                  "resultCode"=>500,                  "message"=>"The password is wrong!please try again."                  ));            echo($json);         }    }else{        //登錄失敗        $json = json_encode(array(              "resultCode"=>500,              "message"=>"please register!"              ));        echo($json);    }}//注冊接口function register(){    $account_name = $_POST["username"];    $password = $_POST["password"];    $result = mysql_query("select * from app_account where account_name='".$account_name."'");    //查詢失敗    if (!$result){        $json = json_encode(array(              "resultCode"=>500,              "message"=>"select failed!"              ));        echo($json);    }    //用戶名已經注冊    if (mysql_num_rows($result) > 0){        $json = json_encode(array(              "resultCode"=>500,              "message"=>"register failed!"              ));        echo($json);    }else{        //插入記錄到數據庫中        $account_id = uniqid();        $salt = uniqid();        $new_password = md5($password."".$salt);        $current_time = new DateTime();        $create_time = $current_time -> format('Y-m-d H:i:s');        $last_login_time = $create_time;        $result = mysql_query("insert into app_account(account_id,account_name,password,salt,creat_time,last_lgin_time) values('".$account_id."', '".$account_name."', '".$new_password."', '".$salt."', '".$create_time."', '".$last_login_time."')");        $user_id = uniqid();        $result1 = mysql_query("INSERT INTO app_user(user_id,username,account_id) VALUES('".$user_id."', '".$account_name."', '".$account_id."')");        if ($result){           $json = json_encode(array(                 "resultCode"=>200,                 "message"=>"register successed!"                 ));           echo($json);        }    }}//文件上傳接口function upload(){}?>

RESTClient測試：
這里寫圖片描述
（注冊也是類似的操作）
（2）文件上傳
因為是模擬，而文件上傳接口涉及到文件的上傳，RESTClient無法模擬。所以單獨寫一個客戶端uploadClient.html來模擬文件上傳。
uploadClient.html

<!DOCTYPE html><html><head>    <title>文件上傳</title>    <meta charset="UTF-8" /></head><body><form action="upload.php" method="post" enctype="multipart/form-data" >    選擇文件：<input type="file" name="filename" />    </br>    用戶ID：<input type="text" name="userid" /></br>    心率：<input type="text" name="rate" /></br>    <input type="submit" value="提交"></form></body></html>

服務端接收文件接口upload.php
upload.php

<?phprequire ("../connect_db.php");$conn = db_connect();mysql_query("set names 'utf8'");mysql_select_db("FECG");$file_name = $_POST["filename"];$userid = $_POST["userid"];$heart_rate = $_POST["rate"];if ($_FILES['filename']['name'] != NULL){    if ($_FILES['filename']['error']){        $data = array(            "resultCode"=>1,            "message"=>"失敗，上傳文件出錯!"        );        echo json_encode($data);    }    else{        //獲取文件后綴名        $file_extension = substr(strrchr($_FILES['filename']['name'], '.'), 1);        //判斷文件夾是否存在        $path = "/var/www/html/FECG/fecg_segment_data/".$userid;        if (!file_exists($path)){            //創建以用戶名命名的文件夾            if(mkdir ($path)){               $data = array("message"=>"ok");               echo json_encode($data);}        }        //對上傳文件進行命名        $file_path = '/var/www/html/FECG/fecg_segment_data/'.$userid.'/'.date("YmdHis").".".$file_extension;        if (is_uploaded_file($_FILES['filename']['tmp_name'])){            $result = move_uploaded_file($_FILES['filename']['tmp_name'], $file_path);            if ($result){                //文件上傳成功，進行第二步更新數據庫                $result = mysql_query("SELECT * FROM app_account WHERE account_name='".$userid."'");                if (!$result){                     $num = 123;                     $data = array(                        "resultCode"=>2,                        "message"=>"userid",                        "data"=>$userid                     );                     echo json_encode($data);                }                $row = mysql_fetch_array($result, MYSQL_ASSOC);                $account_id = $row["account_id"];                $result1 = mysql_query("SELECT * FROM app_user WHERE account_id='".$account_id."'");                $row1 = mysql_fetch_array($result1, MYSQL_ASSOC);                $user_id = $row1["user_id"];                $user_name = $row1["username"];                $ecg_segment_id = uniqid();                $channel = 3;                $current_time = new DateTime();                $create_time = $current_time -> format('Y-m-d H:i:s');                $result = mysql_query("INSERT INTO ecg_segment(ecg_segment_id,channel,heart_rate,ecg_url,user_name,user_id)                                      VALUES('".$ecg_segment_id."', '".$channel."', '".$heart_rate."', '".$file_path."', '".$user_name."', '".$user_id."')");                $task_id = uniqid();                $server_analysis = "異常";                $result1 = mysql_query("INSERT INTO task(task_id,creat_time,server_analysis,ecg_segment_id)                                      VALUES('".$task_id."', '".$create_time."', '".$server_analysis."', '".$ecg_segment_id."')");                if ($result){                    $data = array(                        "resultCode"=>2,                        "message"=>"文件上傳成功!"                        );                    echo json_encode($data);                }                else{                    $data = array(                        "resultCode"=>3,                        "message"=>"服務器錯誤!"                        );                    echo json_encode($data);                }            }            else{                $data = array(                    "resultCode"=>4,                    "message"=>"uploaded failed!"                    );                echo json_encode($data);            }        }        else{            $data = array(                "resultCode"=>5,                "message"=>"文件上傳失敗!"            );            echo json_encode($data);        }    }}else{    $data = array(         "resultCode"=>300,         "message"=>"文件名不能為空!"         );    echo json_encode($data);}?>

（上述代碼都是根據本人項目需要開發的相應接口）