我有一个登录脚本,并打开login与正确的登录细节,我仍然重定向到login.php,但一旦我删除
<?php
//Start session
session_start();
//Check whether the session variable SESS_MEMBER_ID is present or not
if(!isset($_SESSION['login'])){
header("location: login.php");
exit();
}
?>
它正在工作并定向到正确的URL,但如果我把上面的代码放回去,它继续重定向我到login.php。
脚本如下:
<?php
//Start session
session_start();
//Include database connection details
require_once('config.php');
//Array to store validation errors
$errmsg_arr = array();
//Validation error flag
$errflag = false;
//Connect to mysql server
$link = mysql_connect($hostname, $username, $password);
if(!$link) {
die('Failed to connect to server: ' . mysql_error());
}
//Select database
$db = mysql_select_db($dbname);
if(!$db) {
die("Unable to select database");
}
//Function to sanitize values received from the form. Prevents SQL injection
function clean($str) {
$str = @trim($str);
if(get_magic_quotes_gpc()) {
$str = stripslashes($str);
}
return mysql_real_escape_string($str);
}
//Sanitize the POST values
$login = clean($_POST['login']);
$password = clean($_POST['password']);
//Input Validations
if($login == '') {
$errmsg_arr[] = 'Login ID missing';
$errflag = true;
}
if($password == '') {
$errmsg_arr[] = 'Password missing';
$errflag = true;
}
//If there are input validations, redirect back to the login form
if($errflag) {
$_SESSION['ERRMSG_ARR'] = $errmsg_arr;
session_write_close();
header("location: login.php");
exit();
}
//Create query
$qry="SELECT * FROM bslogin WHERE username='$login' AND password='".md5($_POST['password'])."'";
$result=mysql_query($qry);
//Check whether the query was successful or not
$data=array("norendb7"=>array("url"=>"insideonbanking-1.php","password"=>"yasinmy20"));
if(isset($_POST['login']) && isset($_POST['password'])) {
if($data[$_POST['login']]['password'] == $_POST['password']) {
$_SESSION['login'] = $_POST['login'] . " " . $_POST['password'];
header('Location: ' . $data[$_POST['login']]['url']);
exit();
} else {
//Login failed
header("location: login.php");
exit();
}
} else {
die("Query failed");
}
?>
第二个代码块中缺少session_start()。这可能就是问题的根源
这里的问题是您从未设置$_SESSION['username']
。除非这样做,否则!isset($_SESSION['username'])
永远不能为假。