大家好 我是编码新手，现在我正在下面学习 PHP 和 html，我提交了代码，我想在新页面中打印 Hello World，如果给定的用户名和密码正确，但它在同一页面打印 任何人都可以帮助我 提前致谢
<!doctype html>
<html>
<body>
<form action="#" method="post">
<input type="text" name="username" placeholder="Enter The Username"><br>
<input type="password" name="password" placeholder="Enter Password"><br>
<input type="submit" name="submit" value="Login">
<input type="reset" value="Cancel">
</form>
<?php
$a = 123;
$b = 234;
$c = $_POST["username"];
$d = $_POST["password"];
$e = "Hello World!!";
$f = "Error 404 Page Not Found";
if(isset($_POST['submit'])){
if ($a == $c && $b == $d )
{
print "$e";
}
else
{
echo "$f";
}
}
?>
</body>
</html>
您可以使用标头函数，它看起来像这样：
if ($a == $c && $b == $d )
{
header("location: newpage.php");
exit;
}
else
{
echo "$f";
}
或者确实如上所述，我将表单重定向到新页面
首先，
这将是单独部分中html部分，例如login.html：-
<!doctype html>
<html>
<body>
<form action="login.php" method="post"><!-- if you will not give action then form will posted to the same page -->
<input type="text" name="username" placeholder="Enter The Username"><br>
<input type="password" name="password" placeholder="Enter Password"><br>
<input type="submit" name="submit" value="Login">
<input type="reset" value="Cancel"><!-- about this i cannot say anything -->
</form>
</body>
</html>
现在在login.php：-
<?php
$original_user_name = 123; // take variable name that are self descriptive
$original_user_password = 234;
$form_username = $_POST["username"];
$form_password = $_POST["password"];
// $e = "Hello World!!"; no need of extra variable
// $f = "Error 404 Page Not Found"; no need of extra variable
if(isset($_POST['username']) && isset($_POST['password'])){ // check with POSTED values not with button value
if ($original_user_name == $form_username && $original_user_password == $form_password){
echo "hello World!";
}else{
echo "Error 404 Page Not Found!";
}
}else{
echo "please fill both user name and password!";
}
?>
注意：- 两个文件必须位于同一工作目录中。
创建一个新的.php文件，您可以在其中放置PHP代码，并在html文件中，将表单标签更改为< form action="path of that php file" method="post">