我正在用PHP为一个类创建一个页面，当我回显内容时，它显示在错误的位置。
这是我的HTML页面
<html>
<head>
<link rel="stylesheet" href="Site.css">
<?php include("Header.php"); ?>
</div>
</head>
<body>
<div id="main">
<h1>About</h1>
<form action="Insert.php" method="post">
<table>
<tr>
<td><span>First name:</span></td>
<td><input type="text" name="firstname"></td>
</tr>
<tr>
<td><span>Last name:</span></td>
<td><input type="text" name="lastname"></td>
</tr>
<tr>
<td><span>Age:</span></td>
<td><input type="number" name="age"></td>
</tr>
</table>
<input type="submit">
</form>
<?php include("Footer.php");?>
</div>
</body>
</html>
这是我的PHP页面：
<?php
$con = mysql_connect("localhost","USERNAME","PASSWORD");
if(!$con) {
die("could not connect to localhost:" .mysql_error());
}
mysql_select_db("a7068104_world") or die("Cannot connect to database");
header("refresh:1.5; url=NamesAction.php");
$firstname = mysql_real_escape_string($_POST['firstname']);
$lastname = mysql_real_escape_string($_POST['lastname']);
$fullname = mysql_real_escape_string($_POST['firstname'] . " " . $_POST['lastname']);
$age = mysql_real_escape_string($_POST['age']);
$query = "SELECT * FROM names_1 WHERE fullname='$fullname'";
$result = mysql_query($query);
if(mysql_num_rows($result) > 0 ){
echo "Your name is already in the database and will not be added again!";
}
else {
$query = "INSERT INTO names_1 (firstname, lastname, fullname, age) VALUES('$firstname', '$lastname', '$fullname', '$age')";
$result = mysql_query($query);
if($result) {
echo "Your name was successfully added to the database!";
}
else{
echo "Your name couldn't be added to the database!";
}
}
mysql_close($con);
?>
<html>
<head>
<link rel="stylesheet" href="Site.css">
<?php include("Header.php"); ?>
</div>
</head>
<body>
<div id="main">
<h1>Names</h1>
<p>You will be redirected back to the <b>Names</b> page in a moment.</p>
<?php include("Footer.php");?>
</div>
</body>
</html>
当我在PHP页面中回显内容时，它会显示在正上方的框架顶部
<div id="main">
我想把回显的文本放在的最底部
<div id="main">
有什么办法我能做到吗？我感谢你的帮助！
谢谢，Leonardude
您的问题是，在提供HTML之前，您正在回声消息。这在这里很明显：
if($result) {
echo "Your name was successfully added to the database!";
}
else{
echo "Your name couldn't be added to the database!";
}
因为PHP是一种服务器端语言，HTML是客户端语言，所以PHP将在HTML之前处理好，这意味着它将在页面显示之前回显。因此，问题就出现在<div id="main"></div>之前。
解决方法是设置一个可变
if($result) {
$var = "Your name was successfully added to the database!";
}
else{
$var = "Your name couldn't be added to the database!";
}
在<div id="main"></div>的某个地方，你可以做以下事情：
<div id="main">
<?php
if(isset($var) && !empty($var)) {
echo $var;
}
?>
</div>