PHP - 接收检验验证码 ， 以JSON的形式将验证结果返回给前端

<?php

session_start();

$codeT = strtoupper(trim($_POST['codeT']));//接收前端传来的数据，转换成大写

$raw_success = array('codeT' => 1, 'msg' => '验证码正确');

$raw_fail = array('codeT' => 2, 'msg' => '验证码错误');

$res_success = json_encode($raw_success);

$res_fail = json_encode($raw_fail);

header('Content-Type:application/json');//这个类型声明非常关键

echo '$codeT : '.$codeT.'<br>';

echo '$_SESSION["sessionCode"]) : '.$_SESSION["sessionCode"].'<br>';

if ($codeT == $_SESSION["sessionCode"]) {

echo $res_success;

} else {

echo $res_fail;

}

?>