PHP-特定div上的打印输出错误

我知道这个问题听起来很愚蠢，但我需要你的帮助。我的问题是我想在表单内部打印这个“错误”消息，而不是在表单外部打印。当前，“错误”消息打印在顶部

代码如下：

过程：

    if(!$name || !$email || !$comment){

//if not display an error message

echo "<center>All fields are required</center>";
}
else
{

mysql_select_db($database_connection, $connection);

$insert_query = sprintf("INSERT INTO contacts (name, email, comment, date, ip) VALUES (%s, %s, %s, NOW(), %s)",
                        sanitize($name, "text"),
                        sanitize($email, "text"),
                        sanitize($comment, "text"),
                        sanitize($ip, "text"));

$result = mysql_query($insert_query, $connection) or die(mysql_error());
}

if（！$name | |！$email | |！$comment）{
//如果没有，则显示错误消息
echo“所有字段都是必需的”；
}
其他的
{
mysql\u select\u db（$database\u connection，$connection）；
$insert_query=sprintf（“插入联系人（姓名、电子邮件、评论、日期、ip）值（%s，%s，%s，NOW（），%s）”，
清理（$name，“text”），
清理（$email，“text”），
清理（$comment，“text”），
消毒（$ip，“文本”）；
$result=mysql\u query（$insert\u query，$connection）或die（mysql\u error（））；
}

表格：

任何帮助都将不胜感激

使用以下代码： 在PHP代码中：

$nameError = "";
$emailError = "";
$commentError = "";
if(!$name || !$email || !$comment){
if(!$name){
  $nameError = "Name is required";  
}
if(!$email){
  $emailError = "Email is required";
}
if(!$comment) {
  $commentError = "Comment is required";
}

}
else
{

mysql_select_db($database_connection, $connection);

$insert_query = sprintf("INSERT INTO contacts (name, email, comment, date, ip) VALUES (%s, %s, %s, NOW(), %s)",
                        sanitize($name, "text"),
                        sanitize($email, "text"),
                        sanitize($comment, "text"),
                        sanitize($ip, "text"));

$result = mysql_query($insert_query, $connection) or die(mysql_error());
}

在HTML代码中：

<form id="contact" name="contact" action="index.php" method="post">

<fieldset>
               <li><input class="rounded" type="text" name="name" id="name" placeholder="Your Name" required />
                </li>
            <span><?php echo ((isset($nameError) && $nameError != '') ? $nameError : ''); ?> </span> //do that with all the error where you want to place
                <li>
                    <input class="rounded" type="text" name="email" id="email" placeholder="Your Email" required />
                </li>
                <li>
                    <textarea class="rounded" name="comment" id="comment" cols="35" rows="6" placeholder="Your Message" required ></textarea>
                </li>
                <input type="hidden" id="action" name="action" value="submitform" />
                <li>
                <input id="submit" name="submit" type="submit" value="Send" class="submitform" />
                </li>
</fieldset>
</form>

<form id="contact" name="contact" action="index.php" method="post">
<?php if( isset($eror_msg) && $eror_msg != '' ) { echo $eror_msg; } ?>
<fieldset>
----------------------------
-------------------------------

//把所有的错误都放在你想放的地方

使用以下代码： 在PHP代码中：

$nameError = "";
$emailError = "";
$commentError = "";
if(!$name || !$email || !$comment){
if(!$name){
  $nameError = "Name is required";  
}
if(!$email){
  $emailError = "Email is required";
}
if(!$comment) {
  $commentError = "Comment is required";
}

}
else
{

mysql_select_db($database_connection, $connection);

$insert_query = sprintf("INSERT INTO contacts (name, email, comment, date, ip) VALUES (%s, %s, %s, NOW(), %s)",
                        sanitize($name, "text"),
                        sanitize($email, "text"),
                        sanitize($comment, "text"),
                        sanitize($ip, "text"));

$result = mysql_query($insert_query, $connection) or die(mysql_error());
}

在HTML代码中：

<form id="contact" name="contact" action="index.php" method="post">

<fieldset>
               <li><input class="rounded" type="text" name="name" id="name" placeholder="Your Name" required />
                </li>
            <span><?php echo ((isset($nameError) && $nameError != '') ? $nameError : ''); ?> </span> //do that with all the error where you want to place
                <li>
                    <input class="rounded" type="text" name="email" id="email" placeholder="Your Email" required />
                </li>
                <li>
                    <textarea class="rounded" name="comment" id="comment" cols="35" rows="6" placeholder="Your Message" required ></textarea>
                </li>
                <input type="hidden" id="action" name="action" value="submitform" />
                <li>
                <input id="submit" name="submit" type="submit" value="Send" class="submitform" />
                </li>
</fieldset>
</form>

<form id="contact" name="contact" action="index.php" method="post">
<?php if( isset($eror_msg) && $eror_msg != '' ) { echo $eror_msg; } ?>
<fieldset>
----------------------------
-------------------------------

//把所有的错误都放在你想放的地方

在PHP代码中：

if(!$name || !$email || !$comment){
//if not display an error message
    $eror_msg =  "<center>All fields are required</center>";
}

if（！$name | |！$email | |！$comment）{
//如果没有，则显示错误消息
$eror\u msg=“所有字段均为必填项”；
}

在HTML代码中：

<form id="contact" name="contact" action="index.php" method="post">

<fieldset>
               <li><input class="rounded" type="text" name="name" id="name" placeholder="Your Name" required />
                </li>
            <span><?php echo ((isset($nameError) && $nameError != '') ? $nameError : ''); ?> </span> //do that with all the error where you want to place
                <li>
                    <input class="rounded" type="text" name="email" id="email" placeholder="Your Email" required />
                </li>
                <li>
                    <textarea class="rounded" name="comment" id="comment" cols="35" rows="6" placeholder="Your Message" required ></textarea>
                </li>
                <input type="hidden" id="action" name="action" value="submitform" />
                <li>
                <input id="submit" name="submit" type="submit" value="Send" class="submitform" />
                </li>
</fieldset>
</form>

<form id="contact" name="contact" action="index.php" method="post">
<?php if( isset($eror_msg) && $eror_msg != '' ) { echo $eror_msg; } ?>
<fieldset>
----------------------------
-------------------------------

----------------------------
-------------------------------

在PHP代码中：

if(!$name || !$email || !$comment){
//if not display an error message
    $eror_msg =  "<center>All fields are required</center>";
}

if（！$name | |！$email | |！$comment）{
//如果没有，则显示错误消息
$eror\u msg=“所有字段均为必填项”；
}

在HTML代码中：

<form id="contact" name="contact" action="index.php" method="post">

<fieldset>
               <li><input class="rounded" type="text" name="name" id="name" placeholder="Your Name" required />
                </li>
            <span><?php echo ((isset($nameError) && $nameError != '') ? $nameError : ''); ?> </span> //do that with all the error where you want to place
                <li>
                    <input class="rounded" type="text" name="email" id="email" placeholder="Your Email" required />
                </li>
                <li>
                    <textarea class="rounded" name="comment" id="comment" cols="35" rows="6" placeholder="Your Message" required ></textarea>
                </li>
                <input type="hidden" id="action" name="action" value="submitform" />
                <li>
                <input id="submit" name="submit" type="submit" value="Send" class="submitform" />
                </li>
</fieldset>
</form>

<form id="contact" name="contact" action="index.php" method="post">
<?php if( isset($eror_msg) && $eror_msg != '' ) { echo $eror_msg; } ?>
<fieldset>
----------------------------
-------------------------------

----------------------------
-------------------------------

在要打印错误消息的位置添加以下代码：

<div id="error_msg">  
    echo $error_msg;
</div>

echo$error\u msg；

在要打印错误消息的位置添加以下代码：

<div id="error_msg">  
    echo $error_msg;
</div>

echo$error\u msg；

我在您的HTML1中没有看到任何错误消息占位符正如您所知，

标记已被弃用。您的意思是我要在何处显示错误？如果是：所有字段都是必填的

类似的内容？注意@HttpNinja:）知道如何在其中打印错误吗？我在HTML1中没有看到任何错误消息占位符正如您所知，

标记已被弃用。您的意思是我要在何处显示错误？如果是：所有字段都是必填的

类似的内容？注意@HttpNinja:）知道如何在其中打印错误吗？这正是我想要的。谢谢@Goutam Pal！这正是我想要的。谢谢@Goutam Pal！谢谢@Breaked Heart，这好多了！：）谢谢@Breaked Heart，这好多了！：）