Question

在我尝试登录时，在此登录页面上会显示一个空白页面。虽然登录成功，但点击个人资料标签时，dashboard.php可见。此外，整个过程在我的WAMP服务器中运行良好。

导致此问题的原因是什么？

<?php

ob_start();
$host="localhost"; // Host name 
$username="######"; // Mysql username 
$password="######"; // Mysql password 
$db_name="devspan_Users"; // Database name 
$tbl_name="Members"; // Table name 

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

mysql_query("CREATE DATABASE IF NOT EXISTS ".$db_name);
mysql_select_db("$db_name",$con)or die("cannot select DB"); 



if(mysql_num_rows(mysql_query("SHOW TABLES LIKE '".$tbl_name."'",$con))==0)
{
$sql="CREATE TABLE Members(
id int(4) NOT NULL auto_increment,
username varchar(65) NOT NULL default '',
password varchar(65) NOT NULL default '',
PRIMARY KEY (`id`)
)";
mysql_query($sql,$con);
}

// Define $myusername and $mypassword 
$myusername=$_POST['username']; 
$mypassword=$_POST['password']; 

// To protect 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,$con);

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

// If result matched $myusername and $mypassword
if($count==1){
// Register 
session_start();
$_SESSION["myusername"]=$myusername;
$_SESSION["mypassword"]=$mypassword; 
header("location:dashboard.php");
}
else {
echo "Wrong Username or Password";
}
ob_end_flush();
?>

Answer 1

在这段代码中：

// If result matched $myusername and $mypassword
if($count==1){
// Register 
session_start();
$_SESSION["myusername"]=$myusername;
$_SESSION["mypassword"]=$mypassword; 
header("location:dashboard.php");
}
else {
echo "Wrong Username or Password";
}
ob_end_flush();
?>'

最后?>'是什么？只需删除那个＆amp;再试一次。另外，请注意我将header行更改为header('Location: dashboard.php');清理的一部分，此处将其清理。

ob_start();

$host="localhost"; // Host name 
$username="######"; // Mysql username 
$password="######"; // Mysql password 
$db_name="devspan_Users"; // Database name 
$tbl_name="Members"; // Table name 

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

mysql_query("CREATE DATABASE IF NOT EXISTS " . $db_name);
mysql_select_db("$db_name", $con) or die("cannot select DB"); 

if (mysql_num_rows(mysql_query("SHOW TABLES LIKE '" . $tbl_name . "'",$con))= = 0) {
  $sql = "CREATE TABLE"
       . " Members(id int(4) NOT NULL auto_increment,"
       . " username varchar(65) NOT NULL default '',"
       . " password varchar(65) NOT NULL default '',"
       . " PRIMARY KEY (`id`)"
       . ")"
       ;
  mysql_query($sql,$con);
}

// Define $myusername and $mypassword 
$myusername=$_POST['username']; 
$mypassword=$_POST['password']; 

// To protect 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, $con);

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

// If result matched $myusername and $mypassword
if ($count == 1){
  // Register 
  session_start();
  $_SESSION["myusername"] = $myusername;
  $_SESSION["my password"] = $mypassword; 
  header('Location: dashboard.php');
}
else {
  echo "Wrong Username or Password";
}
ob_end_flush();

Answer 2

更新：问题在于我的托管而不是我的代码。 sql查询花了一生的时间来获取数据，因此页面没有加载。解决方案：更改了我的托管服务。

Login.php没有重定向

2 个答案: