PHP How to write a client scan QR code login PC Side Backend function

This article is mainly to share with you how PHP write client scan qr code login PC backend function, I am also the first time to write this function, under Bo main blog inspired by the demo machine to complete this function, I want to re-summarize this code, in case forget.

HTML page

<! DOCTYPE html>
JS Page
 

$.ajax ({type: "GET", url: "er/qrcodelogin/getqruuid.php", data: {}, Success:                function (Result) {Console.log (result);                var data = Json.parse (result);                Console.log (Data.code);                    if (Data.code = = 1) {$ ("#qrcodeimg"). attr (' src ', ' http://qr.liantu.com/api.php?text= ' + result);                    Console.log (Data.data);                    var min=0;                        Interval1= setinterval (function () {min=min+1000;                            $.ajax ({type: "GET", url: "er/qrcodelogin/checkqruuid.php",                                    Data: {' Qruuid ': Data.data}, Success:function (result) {                                    min=min+1000;                              if (min==36000) {console.log (min);          Alert ("The QR code has expired!")                                        ");                                        Clearinterval (INTERVAL1);                                        Location.replace (LOCATION.HREF);                                        min=1000;                                    Interval1 ();                                        }else{console.log (min);                                        var data = Json.parse (result);                                            if (Data.code = = 1) {//alert (' Scan successful (ie login succeeded), jump ...... ');                                            Stop polling clearinterval (INTERVAL1);                                            Location.href= "index.html";                                            TODO get the information needed and then jump to what's}else if (Data.code = = 300) { Alert (' No subsequent user!                                           '); Stop polling clearinterval (INTERVAL1);                                        Location.href= "login.html";                    }                                    }                            }                        }); }, 1000);//1 Second frequency On Demand}});
getqruuid.php page

<?php/** * For front end get Qruuid (QR code unique ID) using * * Created by Phpstorm. * User:caohan * DATE:2017/10/15 * Time: PM 2:59 */require (' config.php ');//Generate random UUID for the contents and bindings of the QR code display with $QRUUID = substr (MD5 ( Uniqid (Mt_rand (), true)), 0, 15),//Generate uuid//Save the generated random number to the database $sql= INSERT into T_pc_code (randnumber) VALUES (' $qruuid '); query = sqlsrv_query ($conn, $sql), if (! $query) {die       (Print_r (Sqlsrv_errors (), True));} $arr = [' Code ' =>1, ' msg ' = ' = ' Generate Qruuid success ', ' data ' = $qruuid];echo json_encode ($arr); exit ();
checkqruuid.php page

<?phpsession_start ();/** * Created by Phpstorm. * User:caohan * DATE:2017/10/15 * Time: PM 3:17 */require (' config.php '); $mysqli = new Mysqli ($db _host, $db _user, $db _pwd, $db _name); if (Mysqli_connect_error ())//Echo Mysqli_connect_error ();  $mysqli->set_charset ("UTF8"); $qruuid = $_get[' Qruuid '); $sql = "SELECT * from T_pc_code where randnumber= '". $qruuid. "'"; $result = Sqlsrv_fetch_array (sqlsrv_query ($conn, $sql)), if (! $result) {die (Print_r (Sqlsrv_errors (), True));}    if (!is_null ($result [' username '])) {$nowusername = $result [' username '];    $sql 2= "SELECT * from T_webuser where username = ' $nowusername ' and isdeleted=0 ';    $result 2 = sqlsrv_query ($conn, $sql 2);         if ($row =sqlsrv_fetch_array ($result 2)) {$_session[' sydsdj_name ']= $row [' username '];         $_session[' Sydsdj_roletype ']= $row [' Roletype '];          $_session[' Sydsdj_orgid ']= $row [' orgId '];          $_session[' sydsdj_orgname ']= $row [' OrgName ']; $_session[' sydsdj_manage_id ']= $row [' ID'];    $arr = [' Code ' = + 1, ' msg ' = ' login successful ', ' data ' = ' $result]; }else{$arr = [' Code ' = ' + ' msg ' = ' Account not registered!    ', ' data ' = $result]; }}else{$arr = [' Code ' = ', ' msg ' = ' qruuid ' is temporarily unbound ', ' data ' = ' $qruuid];} echo Json_encode ($arr); exit ();? >
Interface to client storage user accounts

<?php//specifies that other domain names are allowed to access the  header (' access-control-allow-origin:* '); require (' config.php '); $username = $_request[' Username ']; $randnumber = $_request[' Randnumber '); $result = sqlsrv_query ($conn, "UPDATE T_pc_code set Username= ' $ Username ' where randnumber= ' $randnumber '), if (! $result) {die    (Print_r (Sqlsrv_errors (), true));    $arr = [' Code ' = + 0, ' msg ' = ' sy '];} else{    $arr = [' Code ' = = 1, ' msg ' = ' sy '];} echo Json_encode ($arr);? >