我有这个 php 页面，它会向自己发送信息，然后检查天气是否登录某人。我遇到的问题是，如果它登录...那么它仍然显示用户名和密码文本框..但是如果我刷新它们就会消失，现在由于 session 而出现了欢迎的东西。
我想要的是一旦单击提交并且该人登录后立即不显示文本框(用户名，密码)并显示欢迎消息。现在我必须刷新。
请注意，我是 PHP 新手，任何明智的建议将不胜感激。
<?php
echo "<form method=\"post\" action=\"index.php?form_type=$page_vals\">";
echo "<body>";
//Start session
session_start();
//Check whether the session variable SESS_MEMBER_ID is present or not
if(!isset($_SESSION['SESS_MEMBER_ID']) || (trim($_SESSION['SESS_MEMBER_ID']) == '')) {
extract($_POST);
$username = "";
$password = "";
$userrole = "";
$userid ="";
$login_query = "SELECT user_id, user_role, user_username FROM users WHERE user_username = '$_POST[logInUsername]' AND user_password = '$_POST[logInPassword]'";
if(!($database = mysql_connect("localhost","root","")))
die("<p>Could not connect to database</p></div></div>
</body>
</html>");
if(!mysql_select_db("mydatabase", $database))
die("<p>Could not open my databases database</p></div>
</div>
</body>
</html>");
if(!($result = mysql_query($login_query, $database)))
{
print("Could not execute query!<br/>");
die(mysql_error()."</div>
</div>
</body>
</html>");
}
if (mysql_num_rows($result) == 0) {
print("Please verify your login information<br/>");
}
while ($row = mysql_fetch_assoc($result)) {
$username = $row["user_username"];
$userrole = $row["user_role"];
$userid = $row["user_id"];
}
echo "Hello - '$username'";
mysql_close($database);
session_regenerate_id();
$_SESSION['SESS_MEMBER_ID'] = $userid;
$_SESSION['SESS_NAME'] = $username;
//Write session to disc
session_write_close();
echo '<div id="login" class="login">
<label for="login">User Name</label>
<input type="text" name="logInUsername" />
<label for="Password">Password</label>
<input type="password" name="logInPassword" />
<input type="submit" value="Submit" class="button" />
</div>';
}
else
{
$sessionName = $_SESSION['SESS_NAME'];
echo '<div id="login" class="login">
<label for="welcome">Welcome '. $sessionName.'!</label>
</div>';
}
?>
最佳答案
这里的问题只是你的代码不按顺序排列。我已更正，请立即尝试。
<?php
session_start();
echo "<body>";
//Start session
//print_r($_SESSION);exit;
//Check whether the session variable SESS_MEMBER_ID is present or not
extract($_POST);
$username = "";
$password = "";
$userrole = "";
$userid ="";
if(isset($_POST))
{
$login_query = "SELECT reg_id, role_id, f_name FROM registration WHERE f_name = '$_POST[logInUsername]' AND password = '$_POST[logInPassword]'";
if(!($database = mysql_connect("sunlinux","pukhraj","pukhraj123")))
die("<p>Could not connect to database</p></div></div>
</body>
</html>");
if(!mysql_select_db("testbaj", $database))
die("<p>Could not open my databases database</p></div>
</div>
</body>
</html>");
if(!($result = mysql_query($login_query, $database)))
{
print("Could not execute query!<br/>");
die(mysql_error()."</div>
</div>
</body>
</html>");
}
if (mysql_num_rows($result) == 0) {
print("Please verify your login information<br/>");
}
while ($row = mysql_fetch_assoc($result)) {
$username = $row["f_name"];
$userrole = $row["role"];
$userid = $row["reg_id"];
}
$_SESSION['SESS_MEMBER_ID'] = $userid;
$_SESSION['SESS_NAME'] = $username;
}
if(!isset($_SESSION['SESS_MEMBER_ID']) || (trim($_SESSION['SESS_MEMBER_ID']) == '')) {
echo "Hello - '$username'";
mysql_close($database);
session_regenerate_id();
//Write session to disc
session_write_close();
echo "<form method=\"post\" ><div id=\"login\" class=\"login\">
<label for=\"login\">User Name</label>
<input type=\"text\" name=\"logInUsername\" />
<label for=\"Password\">Password</label>
<input type=\"password\" name=\"logInPassword\" />
<input type=\"submit\" value=\"Submit\" class=\"button\" />
</div>";
}
else
{
$sessionName = $_SESSION['SESS_NAME'];
echo "<div id=\"login\" class=\"login\">
<label for=\"welcome\">Welcome '$sessionName' !</label>
</div>";
}
?>
小改动:
- 只需在适当的位置填写表单标签即可。
- 切勿在发布之后和发布之前混合代码。
- 这里所有数据库内容都应该在提交后执行，因此我将它们包含在条件 if(isset($_POST)) 中
- 由于代码的非线性，它在发布数据后再次刷新后会创建 session 。现已更正。
留言:
进行以下更改:
给出提交按钮的名称
<input type=\"submit\" name=\"submit\" value=\"Submit\" class=\"button\" />将第一个 if 条件替换为
if(isset($_POST['submit']))
关于php - 无法使登录页面正常工作，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/8075405/