MySQL数据库信息未出现在PHP页面上
我遇到了一个奇怪的问题。我正在为MySQL数据库开发一个web界面，并尝试使用PHP从中获取信息。简言之，当我不与其他人在一起时，我能够从一些数据库中很好地检索信息MySQL数据库信息未出现在PHP页面上,php,mysql,Php,Mysql,我遇到了一个奇怪的问题。我正在为MySQL数据库开发一个web界面，并尝试使用PHP从中获取信息。简言之，当我不与其他人在一起时，我能够从一些数据库中很好地检索信息 $userList = mysql_query("SELECT * FROM myTable"); while ($userInfo = mysql_fetch_array($userList) ) { echo "<p>Name = " . $userInfo["name"] . ". Password = "
$userList = mysql_query("SELECT * FROM myTable");
while ($userInfo = mysql_fetch_array($userList) )
{
echo "<p>Name = " . $userInfo["name"] . ". Password = " . $userInfo["password"] . ".</p>";
}
<head>
<title>My Web Interface</title>
</head>
<?php
if (!($_POST["go"]))
{
?><h1>Hello World!</h1>
<form action="test.php" method="post">
Username: <input type="text" name="username" /> <br />
Password: <input type="text" name="password" /> <br />
<input type="submit" name="go" />
</form>
<?php
}
else //the user has submitted: in which case, we check if the details match any user info in the database
{
$username = $_POST["username"];
$password = $_POST["password"];
//the database info variables
$hostname = "myhostname";
$dbUsername = "myusername";
$dbPassword = "mypassword";
echo "<p>You entered the username and password combo of '$username' and '$password'.</p>";
$connect = mysql_connect($hostname, $dbUsername, $dbPassword) or die ("Unable to connect to MySQL");
//test for the connection's presence. Every time so far it's returned True.
if ($connect)
{
echo "Got it!";
}
else
{
echo "Don't got it!";
}
//echo "<p>My username is " . $dbUsername ", my hostname is " . $hostname . " and my password is " . $dbPassword . ".</p>";
$selected = mysql_select_db("myDatabase",$connect)
or die("Could not select examples");
$userList = mysql_query("SELECT * FROM testUsers;");
/****
* This part tests to show a connection between the user and the database.
* It should return a list of users and the rights they have.
***
*/
$found = false; //how we terminate the loop.
//echo "<ul>";
while ($userInfo = mysql_fetch_array($userList) )
{
echo "<p>Name = " . $userInfo["name"] . ". Password = " . $userInfo["password"] . ".</p>";
if ($userInfo["password"] == $password)
{
echo "<p>The passwords match and are both $password!</p>";
}
else
{
echo "<p>$password does not match with " . $userInfo["password"] . "!</p>";
}
}
while ( ($userInfo = mysql_fetch_array($userList) ) && (!($found)) )
{
echo "The current username is " . $userInfo["name"] . ". <ul>";
if ($username == $userInfo["name"])
{
$found = true;
echo "<p>We found you in the database, " . $userInfo['name'] . ". Now to test your password.</p>";
if ($password == $userInfo['password'])
{
echo "<p>The password you entered, " . $userInfo['password'] . " was correct!</p>";
//now show the table's contents
$register = mysql_query("SELECT * FROM myTable;");
while ($col = mysql_fetch_array($register) )
{
echo "<li>Tag: " . $col['service_tag'] . "</li>";
}
}
else //the username is right but the password is wrong.
{
echo "The password didn't match, though!";
}
}
else //this username isn't the right one.
{
echo "<p>$username does not match " . $userInfo['name'] . ".";
}
echo "</ul>";
}
/*
*Test code: trying to output the testUsers info without the conditions.
*/
if (!$found)
{
echo "<p>We could not find you in the database. Did you enter your username correctly?</p>";
}
echo "</ul>";
mysql_close($connect);
}
?>
$userList=mysql\u查询（“从myTable中选择*）；
而（$userInfo=mysql\u fetch\u数组（$userList））
{
echo“Name=“.$userInfo[“Name”]”。Password=“.$userInfo[“Password”]”。”；
<head>
<title>My Web Interface</title>
</head>
<?php
if (!($_POST["go"]))
{
?><h1>Hello World!</h1>
<form action="test.php" method="post">
Username: <input type="text" name="username" /> <br />
Password: <input type="text" name="password" /> <br />
<input type="submit" name="go" />
</form>
<?php
}
else //the user has submitted: in which case, we check if the details match any user info in the database
{
$username = $_POST["username"];
$password = $_POST["password"];
//the database info variables
$hostname = "myhostname";
$dbUsername = "myusername";
$dbPassword = "mypassword";
echo "<p>You entered the username and password combo of '$username' and '$password'.</p>";
$connect = mysql_connect($hostname, $dbUsername, $dbPassword) or die ("Unable to connect to MySQL");
//test for the connection's presence. Every time so far it's returned True.
if ($connect)
{
echo "Got it!";
}
else
{
echo "Don't got it!";
}
//echo "<p>My username is " . $dbUsername ", my hostname is " . $hostname . " and my password is " . $dbPassword . ".</p>";
$selected = mysql_select_db("myDatabase",$connect)
or die("Could not select examples");
$userList = mysql_query("SELECT * FROM testUsers;");
/****
* This part tests to show a connection between the user and the database.
* It should return a list of users and the rights they have.
***
*/
$found = false; //how we terminate the loop.
//echo "<ul>";
while ($userInfo = mysql_fetch_array($userList) )
{
echo "<p>Name = " . $userInfo["name"] . ". Password = " . $userInfo["password"] . ".</p>";
if ($userInfo["password"] == $password)
{
echo "<p>The passwords match and are both $password!</p>";
}
else
{
echo "<p>$password does not match with " . $userInfo["password"] . "!</p>";
}
}
while ( ($userInfo = mysql_fetch_array($userList) ) && (!($found)) )
{
echo "The current username is " . $userInfo["name"] . ". <ul>";
if ($username == $userInfo["name"])
{
$found = true;
echo "<p>We found you in the database, " . $userInfo['name'] . ". Now to test your password.</p>";
if ($password == $userInfo['password'])
{
echo "<p>The password you entered, " . $userInfo['password'] . " was correct!</p>";
//now show the table's contents
$register = mysql_query("SELECT * FROM myTable;");
while ($col = mysql_fetch_array($register) )
{
echo "<li>Tag: " . $col['service_tag'] . "</li>";
}
}
else //the username is right but the password is wrong.
{
echo "The password didn't match, though!";
}
}
else //this username isn't the right one.
{
echo "<p>$username does not match " . $userInfo['name'] . ".";
}
echo "</ul>";
}
/*
*Test code: trying to output the testUsers info without the conditions.
*/
if (!$found)
{
echo "<p>We could not find you in the database. Did you enter your username correctly?</p>";
}
echo "</ul>";
mysql_close($connect);
}
?>
}
while ( ($userInfo = mysql_fetch_array($userList) ) && (!$found) )
{
echo "The current username is " . $userInfo["name"] . ". <ul>";
if ($username == $userInfo["name"])
{
$found = true;
if ($password == $userInfo['password'])
{
echo "The password you entered, " . $userInfo['password'] . " was correct!";
//things which we do once the account is confirmed
}
else //the username is right but the password is wrong.
{
"The password didn't match, though!";
}
}
else //this username isn't the right one.
{
echo "<p>$username does not match " . $userInfo['name'] . ".";
}
echo "</ul>";
}
<head>
<title>My Web Interface</title>
</head>
<?php
if (!($_POST["go"]))
{
?><h1>Hello World!</h1>
<form action="test.php" method="post">
Username: <input type="text" name="username" /> <br />
Password: <input type="text" name="password" /> <br />
<input type="submit" name="go" />
</form>
<?php
}
else //the user has submitted: in which case, we check if the details match any user info in the database
{
$username = $_POST["username"];
$password = $_POST["password"];
//the database info variables
$hostname = "myhostname";
$dbUsername = "myusername";
$dbPassword = "mypassword";
echo "<p>You entered the username and password combo of '$username' and '$password'.</p>";
$connect = mysql_connect($hostname, $dbUsername, $dbPassword) or die ("Unable to connect to MySQL");
//test for the connection's presence. Every time so far it's returned True.
if ($connect)
{
echo "Got it!";
}
else
{
echo "Don't got it!";
}
//echo "<p>My username is " . $dbUsername ", my hostname is " . $hostname . " and my password is " . $dbPassword . ".</p>";
$selected = mysql_select_db("myDatabase",$connect)
or die("Could not select examples");
$userList = mysql_query("SELECT * FROM testUsers;");
/****
* This part tests to show a connection between the user and the database.
* It should return a list of users and the rights they have.
***
*/
$found = false; //how we terminate the loop.
//echo "<ul>";
while ($userInfo = mysql_fetch_array($userList) )
{
echo "<p>Name = " . $userInfo["name"] . ". Password = " . $userInfo["password"] . ".</p>";
if ($userInfo["password"] == $password)
{
echo "<p>The passwords match and are both $password!</p>";
}
else
{
echo "<p>$password does not match with " . $userInfo["password"] . "!</p>";
}
}
while ( ($userInfo = mysql_fetch_array($userList) ) && (!($found)) )
{
echo "The current username is " . $userInfo["name"] . ". <ul>";
if ($username == $userInfo["name"])
{
$found = true;
echo "<p>We found you in the database, " . $userInfo['name'] . ". Now to test your password.</p>";
if ($password == $userInfo['password'])
{
echo "<p>The password you entered, " . $userInfo['password'] . " was correct!</p>";
//now show the table's contents
$register = mysql_query("SELECT * FROM myTable;");
while ($col = mysql_fetch_array($register) )
{
echo "<li>Tag: " . $col['service_tag'] . "</li>";
}
}
else //the username is right but the password is wrong.
{
echo "The password didn't match, though!";
}
}
else //this username isn't the right one.
{
echo "<p>$username does not match " . $userInfo['name'] . ".";
}
echo "</ul>";
}
/*
*Test code: trying to output the testUsers info without the conditions.
*/
if (!$found)
{
echo "<p>We could not find you in the database. Did you enter your username correctly?</p>";
}
echo "</ul>";
mysql_close($connect);
}
?>
while（$userInfo=mysql\u fetch\u array（$userList））&&（！$found））
{
echo“当前用户名为”。$userInfo[“name”]。”；
如果（$username==$userInfo[“name”]）
{
$found=true；
如果（$password==$userInfo['password']））
{
echo“您输入的密码，.$userInfo['password']”正确；
//账户确认后我们所做的事情
}
否则//用户名是正确的，但密码是错误的。
{
“但是密码不匹配！”；
}
}
否则//此用户名不正确。
{
echo“$username与“$userInfo['name']”不匹配；
}
回声“
”；
}
<head>
<title>My Web Interface</title>
</head>
<?php
if (!($_POST["go"]))
{
?><h1>Hello World!</h1>
<form action="test.php" method="post">
Username: <input type="text" name="username" /> <br />
Password: <input type="text" name="password" /> <br />
<input type="submit" name="go" />
</form>
<?php
}
else //the user has submitted: in which case, we check if the details match any user info in the database
{
$username = $_POST["username"];
$password = $_POST["password"];
//the database info variables
$hostname = "myhostname";
$dbUsername = "myusername";
$dbPassword = "mypassword";
echo "<p>You entered the username and password combo of '$username' and '$password'.</p>";
$connect = mysql_connect($hostname, $dbUsername, $dbPassword) or die ("Unable to connect to MySQL");
//test for the connection's presence. Every time so far it's returned True.
if ($connect)
{
echo "Got it!";
}
else
{
echo "Don't got it!";
}
//echo "<p>My username is " . $dbUsername ", my hostname is " . $hostname . " and my password is " . $dbPassword . ".</p>";
$selected = mysql_select_db("myDatabase",$connect)
or die("Could not select examples");
$userList = mysql_query("SELECT * FROM testUsers;");
/****
* This part tests to show a connection between the user and the database.
* It should return a list of users and the rights they have.
***
*/
$found = false; //how we terminate the loop.
//echo "<ul>";
while ($userInfo = mysql_fetch_array($userList) )
{
echo "<p>Name = " . $userInfo["name"] . ". Password = " . $userInfo["password"] . ".</p>";
if ($userInfo["password"] == $password)
{
echo "<p>The passwords match and are both $password!</p>";
}
else
{
echo "<p>$password does not match with " . $userInfo["password"] . "!</p>";
}
}
while ( ($userInfo = mysql_fetch_array($userList) ) && (!($found)) )
{
echo "The current username is " . $userInfo["name"] . ". <ul>";
if ($username == $userInfo["name"])
{
$found = true;
echo "<p>We found you in the database, " . $userInfo['name'] . ". Now to test your password.</p>";
if ($password == $userInfo['password'])
{
echo "<p>The password you entered, " . $userInfo['password'] . " was correct!</p>";
//now show the table's contents
$register = mysql_query("SELECT * FROM myTable;");
while ($col = mysql_fetch_array($register) )
{
echo "<li>Tag: " . $col['service_tag'] . "</li>";
}
}
else //the username is right but the password is wrong.
{
echo "The password didn't match, though!";
}
}
else //this username isn't the right one.
{
echo "<p>$username does not match " . $userInfo['name'] . ".";
}
echo "</ul>";
}
/*
*Test code: trying to output the testUsers info without the conditions.
*/
if (!$found)
{
echo "<p>We could not find you in the database. Did you enter your username correctly?</p>";
}
echo "</ul>";
mysql_close($connect);
}
?>
<head>
<title>My Web Interface</title>
</head>
<?php
if (!($_POST["go"]))
{
?><h1>Hello World!</h1>
<form action="test.php" method="post">
Username: <input type="text" name="username" /> <br />
Password: <input type="text" name="password" /> <br />
<input type="submit" name="go" />
</form>
<?php
}
else //the user has submitted: in which case, we check if the details match any user info in the database
{
$username = $_POST["username"];
$password = $_POST["password"];
//the database info variables
$hostname = "myhostname";
$dbUsername = "myusername";
$dbPassword = "mypassword";
echo "<p>You entered the username and password combo of '$username' and '$password'.</p>";
$connect = mysql_connect($hostname, $dbUsername, $dbPassword) or die ("Unable to connect to MySQL");
//test for the connection's presence. Every time so far it's returned True.
if ($connect)
{
echo "Got it!";
}
else
{
echo "Don't got it!";
}
//echo "<p>My username is " . $dbUsername ", my hostname is " . $hostname . " and my password is " . $dbPassword . ".</p>";
$selected = mysql_select_db("myDatabase",$connect)
or die("Could not select examples");
$userList = mysql_query("SELECT * FROM testUsers;");
/****
* This part tests to show a connection between the user and the database.
* It should return a list of users and the rights they have.
***
*/
$found = false; //how we terminate the loop.
//echo "<ul>";
while ($userInfo = mysql_fetch_array($userList) )
{
echo "<p>Name = " . $userInfo["name"] . ". Password = " . $userInfo["password"] . ".</p>";
if ($userInfo["password"] == $password)
{
echo "<p>The passwords match and are both $password!</p>";
}
else
{
echo "<p>$password does not match with " . $userInfo["password"] . "!</p>";
}
}
while ( ($userInfo = mysql_fetch_array($userList) ) && (!($found)) )
{
echo "The current username is " . $userInfo["name"] . ". <ul>";
if ($username == $userInfo["name"])
{
$found = true;
echo "<p>We found you in the database, " . $userInfo['name'] . ". Now to test your password.</p>";
if ($password == $userInfo['password'])
{
echo "<p>The password you entered, " . $userInfo['password'] . " was correct!</p>";
//now show the table's contents
$register = mysql_query("SELECT * FROM myTable;");
while ($col = mysql_fetch_array($register) )
{
echo "<li>Tag: " . $col['service_tag'] . "</li>";
}
}
else //the username is right but the password is wrong.
{
echo "The password didn't match, though!";
}
}
else //this username isn't the right one.
{
echo "<p>$username does not match " . $userInfo['name'] . ".";
}
echo "</ul>";
}
/*
*Test code: trying to output the testUsers info without the conditions.
*/
if (!$found)
{
echo "<p>We could not find you in the database. Did you enter your username correctly?</p>";
}
echo "</ul>";
mysql_close($connect);
}
?>
<head>
<title>My Web Interface</title>
</head>
<?php
if (!($_POST["go"]))
{
?><h1>Hello World!</h1>
<form action="test.php" method="post">
Username: <input type="text" name="username" /> <br />
Password: <input type="text" name="password" /> <br />
<input type="submit" name="go" />
</form>
<?php
}
else //the user has submitted: in which case, we check if the details match any user info in the database
{
$username = $_POST["username"];
$password = $_POST["password"];
//the database info variables
$hostname = "myhostname";
$dbUsername = "myusername";
$dbPassword = "mypassword";
echo "<p>You entered the username and password combo of '$username' and '$password'.</p>";
$connect = mysql_connect($hostname, $dbUsername, $dbPassword) or die ("Unable to connect to MySQL");
//test for the connection's presence. Every time so far it's returned True.
if ($connect)
{
echo "Got it!";
}
else
{
echo "Don't got it!";
}
//echo "<p>My username is " . $dbUsername ", my hostname is " . $hostname . " and my password is " . $dbPassword . ".</p>";
$selected = mysql_select_db("myDatabase",$connect)
or die("Could not select examples");
$userList = mysql_query("SELECT * FROM testUsers;");
/****
* This part tests to show a connection between the user and the database.
* It should return a list of users and the rights they have.
***
*/
$found = false; //how we terminate the loop.
//echo "<ul>";
while ($userInfo = mysql_fetch_array($userList) )
{
echo "<p>Name = " . $userInfo["name"] . ". Password = " . $userInfo["password"] . ".</p>";
if ($userInfo["password"] == $password)
{
echo "<p>The passwords match and are both $password!</p>";
}
else
{
echo "<p>$password does not match with " . $userInfo["password"] . "!</p>";
}
}
while ( ($userInfo = mysql_fetch_array($userList) ) && (!($found)) )
{
echo "The current username is " . $userInfo["name"] . ". <ul>";
if ($username == $userInfo["name"])
{
$found = true;
echo "<p>We found you in the database, " . $userInfo['name'] . ". Now to test your password.</p>";
if ($password == $userInfo['password'])
{
echo "<p>The password you entered, " . $userInfo['password'] . " was correct!</p>";
//now show the table's contents
$register = mysql_query("SELECT * FROM myTable;");
while ($col = mysql_fetch_array($register) )
{
echo "<li>Tag: " . $col['service_tag'] . "</li>";
}
}
else //the username is right but the password is wrong.
{
echo "The password didn't match, though!";
}
}
else //this username isn't the right one.
{
echo "<p>$username does not match " . $userInfo['name'] . ".";
}
echo "</ul>";
}
/*
*Test code: trying to output the testUsers info without the conditions.
*/
if (!$found)
{
echo "<p>We could not find you in the database. Did you enter your username correctly?</p>";
}
echo "</ul>";
mysql_close($connect);
}
?>
我的Web界面
你好，世界！
用户名：
密码：
我想你给我们看的不是完整的代码。您必须在某个地方为数据库设置凭据，这是在您将值设置为$username之前还是之后？也许您也在数据库连接中使用了$username？我认为您没有向我们展示完整的代码。您必须在某个地方为数据库设置凭据，这是在您将值设置为$username之前还是之后？也许您也在数据库连接中使用了$username？这是因为（！（$found）
在您的while循环中。该循环的最终状态必须为true，循环才能采取行动，但它始终为false，因为您要求它不是false，而是false。因此，它将不起作用，因为不满足条件。
<head>
<title>My Web Interface</title>
</head>
<?php
if (!($_POST["go"]))
{
?><h1>Hello World!</h1>
<form action="test.php" method="post">
Username: <input type="text" name="username" /> <br />
Password: <input type="text" name="password" /> <br />
<input type="submit" name="go" />
</form>
<?php
}
else //the user has submitted: in which case, we check if the details match any user info in the database
{
$username = $_POST["username"];
$password = $_POST["password"];
//the database info variables
$hostname = "myhostname";
$dbUsername = "myusername";
$dbPassword = "mypassword";
echo "<p>You entered the username and password combo of '$username' and '$password'.</p>";
$connect = mysql_connect($hostname, $dbUsername, $dbPassword) or die ("Unable to connect to MySQL");
//test for the connection's presence. Every time so far it's returned True.
if ($connect)
{
echo "Got it!";
}
else
{
echo "Don't got it!";
}
//echo "<p>My username is " . $dbUsername ", my hostname is " . $hostname . " and my password is " . $dbPassword . ".</p>";
$selected = mysql_select_db("myDatabase",$connect)
or die("Could not select examples");
$userList = mysql_query("SELECT * FROM testUsers;");
/****
* This part tests to show a connection between the user and the database.
* It should return a list of users and the rights they have.
***
*/
$found = false; //how we terminate the loop.
//echo "<ul>";
while ($userInfo = mysql_fetch_array($userList) )
{
echo "<p>Name = " . $userInfo["name"] . ". Password = " . $userInfo["password"] . ".</p>";
if ($userInfo["password"] == $password)
{
echo "<p>The passwords match and are both $password!</p>";
}
else
{
echo "<p>$password does not match with " . $userInfo["password"] . "!</p>";
}
}
while ( ($userInfo = mysql_fetch_array($userList) ) && (!($found)) )
{
echo "The current username is " . $userInfo["name"] . ". <ul>";
if ($username == $userInfo["name"])
{
$found = true;
echo "<p>We found you in the database, " . $userInfo['name'] . ". Now to test your password.</p>";
if ($password == $userInfo['password'])
{
echo "<p>The password you entered, " . $userInfo['password'] . " was correct!</p>";
//now show the table's contents
$register = mysql_query("SELECT * FROM myTable;");
while ($col = mysql_fetch_array($register) )
{
echo "<li>Tag: " . $col['service_tag'] . "</li>";
}
}
else //the username is right but the password is wrong.
{
echo "The password didn't match, though!";
}
}
else //this username isn't the right one.
{
echo "<p>$username does not match " . $userInfo['name'] . ".";
}
echo "</ul>";
}
/*
*Test code: trying to output the testUsers info without the conditions.
*/
if (!$found)
{
echo "<p>We could not find you in the database. Did you enter your username correctly?</p>";
}
echo "</ul>";
mysql_close($connect);
}
?>
请尝试从中删除！
，并对其进行测试。如果无法以这种方式执行，请尝试使用以下方法：
<head>
<title>My Web Interface</title>
</head>
<?php
if (!($_POST["go"]))
{
?><h1>Hello World!</h1>
<form action="test.php" method="post">
Username: <input type="text" name="username" /> <br />
Password: <input type="text" name="password" /> <br />
<input type="submit" name="go" />
</form>
<?php
}
else //the user has submitted: in which case, we check if the details match any user info in the database
{
$username = $_POST["username"];
$password = $_POST["password"];
//the database info variables
$hostname = "myhostname";
$dbUsername = "myusername";
$dbPassword = "mypassword";
echo "<p>You entered the username and password combo of '$username' and '$password'.</p>";
$connect = mysql_connect($hostname, $dbUsername, $dbPassword) or die ("Unable to connect to MySQL");
//test for the connection's presence. Every time so far it's returned True.
if ($connect)
{
echo "Got it!";
}
else
{
echo "Don't got it!";
}
//echo "<p>My username is " . $dbUsername ", my hostname is " . $hostname . " and my password is " . $dbPassword . ".</p>";
$selected = mysql_select_db("myDatabase",$connect)
or die("Could not select examples");
$userList = mysql_query("SELECT * FROM testUsers;");
/****
* This part tests to show a connection between the user and the database.
* It should return a list of users and the rights they have.
***
*/
$found = false; //how we terminate the loop.
//echo "<ul>";
while ($userInfo = mysql_fetch_array($userList) )
{
echo "<p>Name = " . $userInfo["name"] . ". Password = " . $userInfo["password"] . ".</p>";
if ($userInfo["password"] == $password)
{
echo "<p>The passwords match and are both $password!</p>";
}
else
{
echo "<p>$password does not match with " . $userInfo["password"] . "!</p>";
}
}
while ( ($userInfo = mysql_fetch_array($userList) ) && (!($found)) )
{
echo "The current username is " . $userInfo["name"] . ". <ul>";
if ($username == $userInfo["name"])
{
$found = true;
echo "<p>We found you in the database, " . $userInfo['name'] . ". Now to test your password.</p>";
if ($password == $userInfo['password'])
{
echo "<p>The password you entered, " . $userInfo['password'] . " was correct!</p>";
//now show the table's contents
$register = mysql_query("SELECT * FROM myTable;");
while ($col = mysql_fetch_array($register) )
{
echo "<li>Tag: " . $col['service_tag'] . "</li>";
}
}
else //the username is right but the password is wrong.
{
echo "The password didn't match, though!";
}
}
else //this username isn't the right one.
{
echo "<p>$username does not match " . $userInfo['name'] . ".";
}
echo "</ul>";
}
/*
*Test code: trying to output the testUsers info without the conditions.
*/
if (!$found)
{
echo "<p>We could not find you in the database. Did you enter your username correctly?</p>";
}
echo "</ul>";
mysql_close($connect);
}
?>
do {
//your code here to motion
}
while()// your conditions
在这种情况下，只要中的状态为true，而中的状态为true，do
将继续工作。这是因为（！（$found）
在您的while循环中。该循环的最终状态必须为true，循环才能采取行动，但它始终为false，因为您要求它不是false，而是false。因此，它将不起作用，因为不满足条件。
<head>
<title>My Web Interface</title>
</head>
<?php
if (!($_POST["go"]))
{
?><h1>Hello World!</h1>
<form action="test.php" method="post">
Username: <input type="text" name="username" /> <br />
Password: <input type="text" name="password" /> <br />
<input type="submit" name="go" />
</form>
<?php
}
else //the user has submitted: in which case, we check if the details match any user info in the database
{
$username = $_POST["username"];
$password = $_POST["password"];
//the database info variables
$hostname = "myhostname";
$dbUsername = "myusername";
$dbPassword = "mypassword";
echo "<p>You entered the username and password combo of '$username' and '$password'.</p>";
$connect = mysql_connect($hostname, $dbUsername, $dbPassword) or die ("Unable to connect to MySQL");
//test for the connection's presence. Every time so far it's returned True.
if ($connect)
{
echo "Got it!";
}
else
{
echo "Don't got it!";
}
//echo "<p>My username is " . $dbUsername ", my hostname is " . $hostname . " and my password is " . $dbPassword . ".</p>";
$selected = mysql_select_db("myDatabase",$connect)
or die("Could not select examples");
$userList = mysql_query("SELECT * FROM testUsers;");
/****
* This part tests to show a connection between the user and the database.
* It should return a list of users and the rights they have.
***
*/
$found = false; //how we terminate the loop.
//echo "<ul>";
while ($userInfo = mysql_fetch_array($userList) )
{
echo "<p>Name = " . $userInfo["name"] . ". Password = " . $userInfo["password"] . ".</p>";
if ($userInfo["password"] == $password)
{
echo "<p>The passwords match and are both $password!</p>";
}
else
{
echo "<p>$password does not match with " . $userInfo["password"] . "!</p>";
}
}
while ( ($userInfo = mysql_fetch_array($userList) ) && (!($found)) )
{
echo "The current username is " . $userInfo["name"] . ". <ul>";
if ($username == $userInfo["name"])
{
$found = true;
echo "<p>We found you in the database, " . $userInfo['name'] . ". Now to test your password.</p>";
if ($password == $userInfo['password'])
{
echo "<p>The password you entered, " . $userInfo['password'] . " was correct!</p>";
//now show the table's contents
$register = mysql_query("SELECT * FROM myTable;");
while ($col = mysql_fetch_array($register) )
{
echo "<li>Tag: " . $col['service_tag'] . "</li>";
}
}
else //the username is right but the password is wrong.
{
echo "The password didn't match, though!";
}
}
else //this username isn't the right one.
{
echo "<p>$username does not match " . $userInfo['name'] . ".";
}
echo "</ul>";
}
/*
*Test code: trying to output the testUsers info without the conditions.
*/
if (!$found)
{
echo "<p>We could not find you in the database. Did you enter your username correctly?</p>";
}
echo "</ul>";
mysql_close($connect);
}
?>
请尝试从中删除！
，并对其进行测试。如果无法以这种方式执行，请尝试使用以下方法：
<head>
<title>My Web Interface</title>
</head>
<?php
if (!($_POST["go"]))
{
?><h1>Hello World!</h1>
<form action="test.php" method="post">
Username: <input type="text" name="username" /> <br />
Password: <input type="text" name="password" /> <br />
<input type="submit" name="go" />
</form>
<?php
}
else //the user has submitted: in which case, we check if the details match any user info in the database
{
$username = $_POST["username"];
$password = $_POST["password"];
//the database info variables
$hostname = "myhostname";
$dbUsername = "myusername";
$dbPassword = "mypassword";
echo "<p>You entered the username and password combo of '$username' and '$password'.</p>";
$connect = mysql_connect($hostname, $dbUsername, $dbPassword) or die ("Unable to connect to MySQL");
//test for the connection's presence. Every time so far it's returned True.
if ($connect)
{
echo "Got it!";
}
else
{
echo "Don't got it!";
}
//echo "<p>My username is " . $dbUsername ", my hostname is " . $hostname . " and my password is " . $dbPassword . ".</p>";
$selected = mysql_select_db("myDatabase",$connect)
or die("Could not select examples");
$userList = mysql_query("SELECT * FROM testUsers;");
/****
* This part tests to show a connection between the user and the database.
* It should return a list of users and the rights they have.
***
*/
$found = false; //how we terminate the loop.
//echo "<ul>";
while ($userInfo = mysql_fetch_array($userList) )
{
echo "<p>Name = " . $userInfo["name"] . ". Password = " . $userInfo["password"] . ".</p>";
if ($userInfo["password"] == $password)
{
echo "<p>The passwords match and are both $password!</p>";
}
else
{
echo "<p>$password does not match with " . $userInfo["password"] . "!</p>";
}
}
while ( ($userInfo = mysql_fetch_array($userList) ) && (!($found)) )
{
echo "The current username is " . $userInfo["name"] . ". <ul>";
if ($username == $userInfo["name"])
{
$found = true;
echo "<p>We found you in the database, " . $userInfo['name'] . ". Now to test your password.</p>";
if ($password == $userInfo['password'])
{
echo "<p>The password you entered, " . $userInfo['password'] . " was correct!</p>";
//now show the table's contents
$register = mysql_query("SELECT * FROM myTable;");
while ($col = mysql_fetch_array($register) )
{
echo "<li>Tag: " . $col['service_tag'] . "</li>";
}
}
else //the username is right but the password is wrong.
{
echo "The password didn't match, though!";
}
}
else //this username isn't the right one.
{
echo "<p>$username does not match " . $userInfo['name'] . ".";
}
echo "</ul>";
}
/*
*Test code: trying to output the testUsers info without the conditions.
*/
if (!$found)
{
echo "<p>We could not find you in the database. Did you enter your username correctly?</p>";
}
echo "</ul>";
mysql_close($connect);
}
?>
do {
//your code here to motion
}
while()// your conditions
在这种情况下，只要中的状态为true，而中的状态为true，do
将继续工作。完成第一个块后，光标位于$userList的末尾。因此，在第二个块中，没有更多的内容可供阅读
<head>
<title>My Web Interface</title>
</head>
<?php
if (!($_POST["go"]))
{
?><h1>Hello World!</h1>
<form action="test.php" method="post">
Username: <input type="text" name="username" /> <br />
Password: <input type="text" name="password" /> <br />
<input type="submit" name="go" />
</form>
<?php
}
else //the user has submitted: in which case, we check if the details match any user info in the database
{
$username = $_POST["username"];
$password = $_POST["password"];
//the database info variables
$hostname = "myhostname";
$dbUsername = "myusername";
$dbPassword = "mypassword";
echo "<p>You entered the username and password combo of '$username' and '$password'.</p>";
$connect = mysql_connect($hostname, $dbUsername, $dbPassword) or die ("Unable to connect to MySQL");
//test for the connection's presence. Every time so far it's returned True.
if ($connect)
{
echo "Got it!";
}
else
{
echo "Don't got it!";
}
//echo "<p>My username is " . $dbUsername ", my hostname is " . $hostname . " and my password is " . $dbPassword . ".</p>";
$selected = mysql_select_db("myDatabase",$connect)
or die("Could not select examples");
$userList = mysql_query("SELECT * FROM testUsers;");
/****
* This part tests to show a connection between the user and the database.
* It should return a list of users and the rights they have.
***
*/
$found = false; //how we terminate the loop.
//echo "<ul>";
while ($userInfo = mysql_fetch_array($userList) )
{
echo "<p>Name = " . $userInfo["name"] . ". Password = " . $userInfo["password"] . ".</p>";
if ($userInfo["password"] == $password)
{
echo "<p>The passwords match and are both $password!</p>";
}
else
{
echo "<p>$password does not match with " . $userInfo["password"] . "!</p>";
}
}
while ( ($userInfo = mysql_fetch_array($userList) ) && (!($found)) )
{
echo "The current username is " . $userInfo["name"] . ". <ul>";
if ($username == $userInfo["name"])
{
$found = true;
echo "<p>We found you in the database, " . $userInfo['name'] . ". Now to test your password.</p>";
if ($password == $userInfo['password'])
{
echo "<p>The password you entered, " . $userInfo['password'] . " was correct!</p>";
//now show the table's contents
$register = mysql_query("SELECT * FROM myTable;");
while ($col = mysql_fetch_array($register) )
{
echo "<li>Tag: " . $col['service_tag'] . "</li>";
}
}
else //the username is right but the password is wrong.
{
echo "The password didn't match, though!";
}
}
else //this username isn't the right one.
{
echo "<p>$username does not match " . $userInfo['name'] . ".";
}
echo "</ul>";
}
/*
*Test code: trying to output the testUsers info without the conditions.
*/
if (!$found)
{
echo "<p>We could not find you in the database. Did you enter your username correctly?</p>";
}
echo "</ul>";
mysql_close($connect);
}
?>
$userInfo = mysql_fetch_array($userList)
尝试在第二个块之前包含以下语句，以将光标移回第一个项：
<head>
<title>My Web Interface</title>
</head>
<?php
if (!($_POST["go"]))
{
?><h1>Hello World!</h1>
<form action="test.php" method="post">
Username: <input type="text" name="username" /> <br />
Password: <input type="text" name="password" /> <br />
<input type="submit" name="go" />
</form>
<?php
}
else //the user has submitted: in which case, we check if the details match any user info in the database
{
$username = $_POST["username"];
$password = $_POST["password"];
//the database info variables
$hostname = "myhostname";
$dbUsername = "myusername";
$dbPassword = "mypassword";
echo "<p>You entered the username and password combo of '$username' and '$password'.</p>";
$connect = mysql_connect($hostname, $dbUsername, $dbPassword) or die ("Unable to connect to MySQL");
//test for the connection's presence. Every time so far it's returned True.
if ($connect)
{
echo "Got it!";
}
else
{
echo "Don't got it!";
}
//echo "<p>My username is " . $dbUsername ", my hostname is " . $hostname . " and my password is " . $dbPassword . ".</p>";
$selected = mysql_select_db("myDatabase",$connect)
or die("Could not select examples");
$userList = mysql_query("SELECT * FROM testUsers;");
/****
* This part tests to show a connection between the user and the database.
* It should return a list of users and the rights they have.
***
*/
$found = false; //how we terminate the loop.
//echo "<ul>";
while ($userInfo = mysql_fetch_array($userList) )
{
echo "<p>Name = " . $userInfo["name"] . ". Password = " . $userInfo["password"] . ".</p>";
if ($userInfo["password"] == $password)
{
echo "<p>The passwords match and are both $password!</p>";
}
else
{
echo "<p>$password does not match with " . $userInfo["password"] . "!</p>";
}
}
while ( ($userInfo = mysql_fetch_array($userList) ) && (!($found)) )
{
echo "The current username is " . $userInfo["name"] . ". <ul>";
if ($username == $userInfo["name"])
{
$found = true;
echo "<p>We found you in the database, " . $userInfo['name'] . ". Now to test your password.</p>";
if ($password == $userInfo['password'])
{
echo "<p>The password you entered, " . $userInfo['password'] . " was correct!</p>";
//now show the table's contents
$register = mysql_query("SELECT * FROM myTable;");
while ($col = mysql_fetch_array($register) )
{
echo "<li>Tag: " . $col['service_tag'] . "</li>";
}
}
else //the username is right but the password is wrong.
{
echo "The password didn't match, though!";
}
}
else //this username isn't the right one.
{
echo "<p>$username does not match " . $userInfo['name'] . ".";
}
echo "</ul>";
}
/*
*Test code: trying to output the testUsers info without the conditions.
*/
if (!$found)
{
echo "<p>We could not find you in the database. Did you enter your username correctly?</p>";
}
echo "</ul>";
mysql_close($connect);
}
?>
mysql_data_seek($userList, 0);
或者更好：
<head>
<title>My Web Interface</title>
</head>
<?php
if (!($_POST["go"]))
{
?><h1>Hello World!</h1>
<form action="test.php" method="post">
Username: <input type="text" name="username" /> <br />
Password: <input type="text" name="password" /> <br />
<input type="submit" name="go" />
</form>
<?php
}
else //the user has submitted: in which case, we check if the details match any user info in the database
{
$username = $_POST["username"];
$password = $_POST["password"];
//the database info variables
$hostname = "myhostname";
$dbUsername = "myusername";
$dbPassword = "mypassword";
echo "<p>You entered the username and password combo of '$username' and '$password'.</p>";
$connect = mysql_connect($hostname, $dbUsername, $dbPassword) or die ("Unable to connect to MySQL");
//test for the connection's presence. Every time so far it's returned True.
if ($connect)
{
echo "Got it!";
}
else
{
echo "Don't got it!";
}
//echo "<p>My username is " . $dbUsername ", my hostname is " . $hostname . " and my password is " . $dbPassword . ".</p>";
$selected = mysql_select_db("myDatabase",$connect)
or die("Could not select examples");
$userList = mysql_query("SELECT * FROM testUsers;");
/****
* This part tests to show a connection between the user and the database.
* It should return a list of users and the rights they have.
***
*/
$found = false; //how we terminate the loop.
//echo "<ul>";
while ($userInfo = mysql_fetch_array($userList) )
{
echo "<p>Name = " . $userInfo["name"] . ". Password = " . $userInfo["password"] . ".</p>";
if ($userInfo["password"] == $password)
{
echo "<p>The passwords match and are both $password!</p>";
}
else
{
echo "<p>$password does not match with " . $userInfo["password"] . "!</p>";
}
}
while ( ($userInfo = mysql_fetch_array($userList) ) && (!($found)) )
{
echo "The current username is " . $userInfo["name"] . ". <ul>";
if ($username == $userInfo["name"])
{
$found = true;
echo "<p>We found you in the database, " . $userInfo['name'] . ". Now to test your password.</p>";
if ($password == $userInfo['password'])
{
echo "<p>The password you entered, " . $userInfo['password'] . " was correct!</p>";
//now show the table's contents
$register = mysql_query("SELECT * FROM myTable;");
while ($col = mysql_fetch_array($register) )
{
echo "<li>Tag: " . $col['service_tag'] . "</li>";
}
}
else //the username is right but the password is wrong.
{
echo "The password didn't match, though!";
}
}
else //this username isn't the right one.
{
echo "<p>$username does not match " . $userInfo['name'] . ".";
}
echo "</ul>";
}
/*
*Test code: trying to output the testUsers info without the conditions.
*/
if (!$found)
{
echo "<p>We could not find you in the database. Did you enter your username correctly?</p>";
}
echo "</ul>";
mysql_close($connect);
}
?>
if (!mysql_data_seek($userList, 0))
{
echo "You can't go back (seek): " . mysql_error() . "\n";
}
else
{
// Block 2
}
完成第一个块后，光标位于$userList的末尾。因此，在第二个块中，没有更多的内容可供阅读
<head>
<title>My Web Interface</title>
</head>
<?php
if (!($_POST["go"]))
{
?><h1>Hello World!</h1>
<form action="test.php" method="post">
Username: <input type="text" name="username" /> <br />
Password: <input type="text" name="password" /> <br />
<input type="submit" name="go" />
</form>
<?php
}
else //the user has submitted: in which case, we check if the details match any user info in the database
{
$username = $_POST["username"];
$password = $_POST["password"];
//the database info variables
$hostname = "myhostname";
$dbUsername = "myusername";
$dbPassword = "mypassword";
echo "<p>You entered the username and password combo of '$username' and '$password'.</p>";
$connect = mysql_connect($hostname, $dbUsername, $dbPassword) or die ("Unable to connect to MySQL");
//test for the connection's presence. Every time so far it's returned True.
if ($connect)
{
echo "Got it!";
}
else
{
echo "Don't got it!";
}
//echo "<p>My username is " . $dbUsername ", my hostname is " . $hostname . " and my password is " . $dbPassword . ".</p>";
$selected = mysql_select_db("myDatabase",$connect)
or die("Could not select examples");
$userList = mysql_query("SELECT * FROM testUsers;");
/****
* This part tests to show a connection between the user and the database.
* It should return a list of users and the rights they have.
***
*/
$found = false; //how we terminate the loop.
//echo "<ul>";
while ($userInfo = mysql_fetch_array($userList) )
{
echo "<p>Name = " . $userInfo["name"] . ". Password = " . $userInfo["password"] . ".</p>";
if ($userInfo["password"] == $password)
{
echo "<p>The passwords match and are both $password!</p>";
}
else
{
echo "<p>$password does not match with " . $userInfo["password"] . "!</p>";
}
}
while ( ($userInfo = mysql_fetch_array($userList) ) && (!($found)) )
{
echo "The current username is " . $userInfo["name"] . ". <ul>";
if ($username == $userInfo["name"])
{
$found = true;
echo "<p>We found you in the database, " . $userInfo['name'] . ". Now to test your password.</p>";
if ($password == $userInfo['password'])
{
echo "<p>The password you entered, " . $userInfo['password'] . " was correct!</p>";
//now show the table's contents
$register = mysql_query("SELECT * FROM myTable;");
while ($col = mysql_fetch_array($register) )
{
echo "<li>Tag: " . $col['service_tag'] . "</li>";
}
}
else //the username is right but the password is wrong.
{
echo "The password didn't match, though!";
}
}
else //this username isn't the right one.
{
echo "<p>$username does not match " . $userInfo['name'] . ".";
}
echo "</ul>";
}
/*
*Test code: trying to output the testUsers info without the conditions.
*/
if (!$found)
{
echo "<p>We could not find you in the database. Did you enter your username correctly?</p>";
}
echo "</ul>";
mysql_close($connect);
}
?>
$userInfo = mysql_fetch_array($userList)
尝试在第二个块之前包含以下语句，以将光标移回第一个项：
<head>
<title>My Web Interface</title>
</head>
<?php
if (!($_POST["go"]))
{
?><h1>Hello World!</h1>
<form action="test.php" method="post">
Username: <input type="text" name="username" /> <br />
Password: <input type="text" name="password" /> <br />
<input type="submit" name="go" />
</form>
<?php
}
else //the user has submitted: in which case, we check if the details match any user info in the database
{
$username = $_POST["username"];
$password = $_POST["password"];
//the database info variables
$hostname = "myhostname";
$dbUsername = "myusername";
$dbPassword = "mypassword";
echo "<p>You entered the username and password combo of '$username' and '$password'.</p>";
$connect = mysql_connect($hostname, $dbUsername, $dbPassword) or die ("Unable to connect to MySQL");
//test for the connection's presence. Every time so far it's returned True.
if ($connect)
{
echo "Got it!";
}
else
{
echo "Don't got it!";
}
//echo "<p>My username is " . $dbUsername ", my hostname is " . $hostname . " and my password is " . $dbPassword . ".</p>";
$selected = mysql_select_db("myDatabase",$connect)
or die("Could not select examples");
$userList = mysql_query("SELECT * FROM testUsers;");
/****
* This part tests to show a connection between the user and the database.
* It should return a list of users and the rights they have.
***
*/
$found = false; //how we terminate the loop.
//echo "<ul>";
while ($userInfo = mysql_fetch_array($userList) )
{
echo "<p>Name = " . $userInfo["name"] . ". Password = " . $userInfo["password"] . ".</p>";
if ($userInfo["password"] == $password)
{
echo "<p>The passwords match and are both $password!</p>";
}
else
{
echo "<p>$password does not match with " . $userInfo["password"] . "!</p>";
}
}
while ( ($userInfo = mysql_fetch_array($userList) ) && (!($found)) )
{
echo "The current username is " . $userInfo["name"] . ". <ul>";
if ($username == $userInfo["name"])
{
$found = true;
echo "<p>We found you in the database, " . $userInfo['name'] . ". Now to test your password.</p>";
if ($password == $userInfo['password'])
{
echo "<p>The password you entered, " . $userInfo['password'] . " was correct!</p>";
//now show the table's contents
$register = mysql_query("SELECT * FROM myTable;");
while ($col = mysql_fetch_array($register) )
{
echo "<li>Tag: " . $col['service_tag'] . "</li>";
}
}
else //the username is right but the password is wrong.
{
echo "The password didn't match, though!";
}
}
else //this username isn't the right one.
{
echo "<p>$username does not match " . $userInfo['name'] . ".";
}
echo "</ul>";
}
/*
*Test code: trying to output the testUsers info without the conditions.
*/
if (!$found)
{
echo "<p>We could not find you in the database. Did you enter your username correctly?</p>";
}
echo "</ul>";
mysql_close($connect);
}
?>
mysql_data_seek($userList, 0);
或者更好：
<head>
<title>My Web Interface</title>
</head>
<?php
if (!($_POST["go"]))
{
?><h1>Hello World!</h1>
<form action="test.php" method="post">
Username: <input type="text" name="username" /> <br />
Password: <input type="text" name="password" /> <br />
<input type="submit" name="go" />
</form>
<?php
}
else //the user has submitted: in which case, we check if the details match any user info in the database
{
$username = $_POST["username"];
$password = $_POST["password"];
//the database info variables
$hostname = "myhostname";
$dbUsername = "myusername";
$dbPassword = "mypassword";
echo "<p>You entered the username and password combo of '$username' and '$password'.</p>";
$connect = mysql_connect($hostname, $dbUsername, $dbPassword) or die ("Unable to connect to MySQL");
//test for the connection's presence. Every time so far it's returned True.
if ($connect)
{
echo "Got it!";
}
else
{
echo "Don't got it!";
}
//echo "<p>My username is " . $dbUsername ", my hostname is " . $hostname . " and my password is " . $dbPassword . ".</p>";
$selected = mysql_select_db("myDatabase",$connect)
or die("Could not select examples");
$userList = mysql_query("SELECT * FROM testUsers;");
/****
* This part tests to show a connection between the user and the database.
* It should return a list of users and the rights they have.
***
*/
$found = false; //how we terminate the loop.
//echo "<ul>";
while ($userInfo = mysql_fetch_array($userList) )
{
echo "<p>Name = " . $userInfo["name"] . ". Password = " . $userInfo["password"] . ".</p>";
if ($userInfo["password"] == $password)
{
echo "<p>The passwords match and are both $password!</p>";
}
else
{
echo "<p>$password does not match with " . $userInfo["password"] . "!</p>";
}
}
while ( ($userInfo = mysql_fetch_array($userList) ) && (!($found)) )
{
echo "The current username is " . $userInfo["name"] . ". <ul>";
if ($username == $userInfo["name"])
{
$found = true;
echo "<p>We found you in the database, " . $userInfo['name'] . ". Now to test your password.</p>";
if ($password == $userInfo['password'])
{
echo "<p>The password you entered, " . $userInfo['password'] . " was correct!</p>";
//now show the table's contents
$register = mysql_query("SELECT * FROM myTable;");
while ($col = mysql_fetch_array($register) )
{
echo "<li>Tag: " . $col['service_tag'] . "</li>";
}
}
else //the username is right but the password is wrong.
{
echo "The password didn't match, though!";
}
}
else //this username isn't the right one.
{
echo "<p>$username does not match " . $userInfo['name'] . ".";
}
echo "</ul>";
}
/*
*Test code: trying to output the testUsers info without the conditions.
*/
if (!$found)
{
echo "<p>We could not find you in the database. Did you enter your username correctly?</p>";
}
echo "</ul>";
mysql_close($connect);
}
?>
if (!mysql_data_seek($userList, 0))
{
echo "You can't go back (seek): " . mysql_error() . "\n";
}
else
{
// Block 2
}
请注意，您没有回显“密码不匹配！”；
，如果不是打字错误，这将引发错误。回显“您输入的密码”.$userInfo['password']”是正确的！”；
-文字无法表达这是多么可怕的想法。1）永远不要以纯文本形式存储密码。2）永远不要显示密码。（注意：如果您遵循步骤1，您将自动获得步骤2。）此外，如果登录失败，只需告诉用户登录失败。你给他们的信息太多了。“用户名不匹配”、“密码不匹配”，这是太多的错误信息。您确实应该在查询中使用where
子句，因此您只会首先返回匹配的行。想象一下，如果谷歌有这个登录系统，必须输出20亿个“不匹配”行和一行您的登录信息实际成功。您从哪里获得$username
和$password
？此外，mysql\u查询也不推荐使用。查看mySQLi或PDO。我也赞同其他评论的关切。为什么要显示密码或将其存储为明文？您可以使用WHERE
子句在查询中完成所有这些操作其中username=$username和password=$password
如果结果为零，则不存在匹配项。好吧，除了前面提到的几点之外：$userInfo
包含哪些内容？请注意，您没有回应“但是密码不匹配！”
如果不是输入错误，则会抛出错误。回显“您输入的密码”$userInfo['password']。“没错！”-语言无法表达这是多么可怕的想法。1） 永远不要以纯文本形式存储密码。2） 永远不要显示密码。（注意：如果您遵循步骤1，您将自动获得步骤2。）此外，如果登录失败，只需告诉用户登录失败。你给他们的信息太多了。“用户名不匹配”，“密码不匹配”，这是太多的错误信息。你真的很生气