我一直在尝试创建一个用户登录页面,当用户登录时,该页面将根据用户id将用户重定向到特定的url。
更具体地说,假设在数据库中我有4行:id,用户名、密码和重定向。成功登录后,它将转到用户的特定行,获取重定向url,并将用户重定向到该url。我已经制作了一个脚本,可以根据数据库的重定向url重定向url,但当我向数据库添加更多用户时,它会冻结,通常不会显示任何内容或重定向到错误的url。这是代码:
<?php
$host="localhost"; // Host name
$username="root"; // Mysql username
$password=""; // 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['username'] = $myusername;
$_SESSION['password'] = $mypassword;
$result = mysql_query("SELECT redirect FROM members");
while ($row = mysql_fetch_array($result, MYSQL_ASSOC)) {
header("Location: " . $row['redirect']);
}
exit();
}
else {
echo "Wrong Username or Password";
}
?>
我真的很感激任何帮助、指导或批评。非常感谢。(请在你的回答中说明一下,我对网络开发还很陌生。))
由于您只能重定向一个人一次,并且您已经从检查用户名和密码匹配的原始选择查询中获得了redirect
值,因此我会将您的代码更改为以下内容:
$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['username'] = $myusername;
$_SESSION['password'] = $mypassword;
$result = mysql_fetch_array($result); // get the result set from the query
$redirect = trim($result['redirect']); // get the redirect column's value
if ($redirect == '') {
echo "No redirect value was set!";
} else {
header('Location: ' . $redirect);
exit;
}
} else {
echo "Wrong Username or Password";
}
$result = mysql_query("SELECT redirect FROM members");
while ($row = mysql_fetch_array($result, MYSQL_ASSOC)) {
header("Location: " . $row['redirect']);
}
exit();
我会从第一行开始。此查询显示成员表中所有行的pull重定向。之后,您将运行到一个循环,在该循环中,您将尝试重定向到每个值。