JSON和Ajax登录功能

Question

请问user.json应该写什么？

<?php

header('Content-Type:application/json');

$isUsername = array_key_exists('username', $_REQUEST);

$username = $isUsername ? $_REQUEST['username'] : '';

if(!$username){

$msg = printMsg('参数有误',2);

echo json_encode($msg,true);

exit();

}

function printMsg($msg,$code){

return array(

'msg' => $msg,

'code' => $code

);

}

$fileStr = __DIR__.'/user.json';

$fileStream = fopen($fileStr,'r');

$fileContent = fread($fileStream, filesize($fileStr));

$fileContent_array = $fileContent ? json_decode($fileContent,true) : array();

fclose($fileStream);

// 判断用户名是否有重复的

$isRepeat = false;

foreach ($fileContent_array as $key => $val) {

# code...

if($val['username'] === $username){

$isRepeat = true;

break;

}

}

if($isRepeat){

$msg = printMsg('用户名重复',0);

echo json_encode($msg,true);

exit();

}

$msg = printMsg('用户名可用',1);

echo json_encode($msg,true);

?> 

Answer 1

{"username":"有课学"}类似上面这种 JSON 格式的字符串即可