Question

错误是这样的：

致命错误：在第3行的C：\ xampp \ htdocs \ sigh \ login_success.php中调用未定义的函数session_is_registered（）

这里是编码：

main_login.php

<html>
<head>
<title>User Registration Form</title>

</head>

<body>
<table width="300" border="0" align="center" cellpadding="0" cellspacing="1" bgcolor="#CCCCCC">
<tr>
<form name="form1" method="post" action="checklogin.php">
<td>
<table width="100%" border="0" cellpadding="3" cellspacing="1" bgcolor="#FFFFFF">
<tr>
<td colspan="3"><strong>Member Login </strong></td>
</tr>
<tr>
<td width="78">Username</td>
<td width="6">:</td>
<td width="294"><input name="myusername" type="text" id="myusername"></td>
</tr>
<tr>
<td>Password</td>
<td>:</td>
<td><input name="mypassword" type="text" id="mypassword"></td>
</tr>
<tr>
<td>&nbsp;</td>
<td>&nbsp;</td>
<td><input type="submit" name="Submit" value="Login"></td>
</tr>
</table>
</td>
</form>
</tr>
</table>
</form>
</td>
</tr>
</table>
</body>
</html>

checklogin.php

<?php
session_start();
$host="localhost"; // Host name 
$username="root"; // Mysql username 
$password="1234"; // Mysql password 
$db_name="test"; // Database name 
$tbl_name="members"; // Table name 

// Connect to server and select databse.
mysql_connect("$host", "$username", "$password")or die("cannot connect"); 
mysql_select_db("$db_name")or die("cannot select DB");

// username and password sent from form 
$myusername=$_POST['myusername']; 
$mypassword=$_POST['mypassword']; 

// To protect MySQL injection (more detail about MySQL injection)
$myusername = stripslashes($myusername);
$mypassword = stripslashes($mypassword);
$myusername = mysql_real_escape_string($myusername);
$mypassword = mysql_real_escape_string($mypassword);
$sql="SELECT * FROM $tbl_name WHERE username='$myusername' and password='$mypassword'";
$result=mysql_query($sql);

// Mysql_num_row is counting table row
$count=mysql_num_rows($result);

// If result matched $myusername and $mypassword, table row must be 1 row
if($count==1){

// Register $myusername, $mypassword and redirect to file "login_success.php"

$_SESSION["myusername"]=$myusername;
$_SESSION["mypassword"]=$mypassword;
header("location:login_success.php");
}
else {
echo "Wrong Username or Password";
}
?>

Logout.php

<?php 
session_start();
session_destroy();
?>

login_sucess.php

<?php
session_start();
if(!session_is_registered(myusername)){
header("location:main_login.php");
}
?>

<html>
<body>
Login Successful
</body>
</html>

这里似乎有什么问题？

Answer 1

从session_is_registered

上的C:\xampp\htdocs\sigh\login_success.php移除line 3

在PHP5.4中删除了此功能。 Documentation。

如果由于某种原因需要它，请考虑将php降级为php＆lt; = 5.3

Answer 2

session_is_registered自PHP 5.3.0起已弃用，自PHP 5.4.0起已被删除

Answer 3

manual说，

自PHP 5.3.0开始，此函数已被弃用，自PHP 5.4.0起已被删除。

检查$ _SESSION是否有效

if(isset($_SESSION['login']) && !empty($_SESSION['login']) ){
  //do something
}

我的php登录有致命错误

3 个答案: