abstract：php六種輸出字符串函數(shù)的運(yùn)用方式，及在常用pHP函數(shù)的介紹和運(yùn)用<meta charset="utf-8"><form method="post" class="denglu">    用戶名:<input name="user" type="text&qu

php六種輸出字符串函數(shù)的運(yùn)用方式，及在常用pHP函數(shù)的介紹和運(yùn)用

<meta charset="utf-8">
<form method="post" class="denglu">
   用戶名:<input name="user" type="text" ><br>
   密碼:<input name="pwd" type="text" ><br>
  <input type="submit" name="login" value="登錄">
</form>
<?php
function login($username, $password,$user)
{
   if (empty($username) || empty($password) ){
       echo '<script> alert("用戶名和密碼不能為空");location.href="";</script>';
   }

   if($username == $user['admin'] && md5($password) == $user['pwd']) {
       echo '<script> alert("登錄成功~~");location.href="?liuyan=1";</script>';
   } else {
       echo '<script> alert("登錄失敗,請(qǐng)檢查用戶名或密碼~~");location.href="";</script>';
   }
}

$user=['admin'=>'admin','pwd'=>'e10adc3949ba59abbe56e057f20f883e'];
$username=isset($_POST['user']) ? trim($_POST['user']) : "";
$password=isset($_POST['pwd']) ? trim($_POST['pwd']) : "";
if(@$_POST['login']) {
   login($username, $password,$user);
}

$get=@$_GET['liuyan'];

if($get==1){?>
<style type="text/css">
   .denglu{ display: none;}
</style>
<form method="post" action="?liuyan=1">
   <textarea name="wen">發(fā)表留言</textarea><br>
   <input type="submit" value="留言" name="liuyan">
</form>
<?php

if(@$_POST['liuyan']){
   echo substr($_POST['wen'],0,10)."。。。。。。";
}

?>



<?php } ?>

Correcting teacher：韋小寶Correction time：2018-12-15 16:24:12
Teacher's summary：寫的很不錯(cuò)哦！課后要記得多多練習(xí)才可以哦！