我试图建立以下形式:
<form method="post" action="Index.php">
<label>Name </label>
<input name="name" placeholder="Type Here"><br />
</br>
<label>Email </label>
<input name="email" placeholder="Type Here">
<br /></br>
<label style="display:block;">I need some information regarding:</label>
<textarea name="message" placeholder="Type Here"></textarea>
<br />
<label>*What is 2+2? (Anti-spam)</label>
<input name="human" placeholder="Type Here">
<br />
<input id="submit" name="submit" type="submit" value="Submit" style="height:30px;">
</form>
PHP代码:
<?php
$name = $_POST['name'];
$email = $_POST['email'];
$message = $_POST['message'];
$from = 'From: TangledDemo';
$to = 'hello@emailaddress.com';
$subject = 'Hello';
$human = $_POST['human'];
$body = "From: $name'n E-Mail: $email'n Message:'n $message";
if ($_POST['submit'] && $human == '4') {
if (mail ($to, $subject, $body, $from)) {
echo '<p>Your message has been sent!</p>';
} else {
echo '<p>Something went wrong, go back and try again!</p>';
}
} else if ($_POST['submit'] && $human != '4') {
echo '<p>You answered the anti-spam question incorrectly!</p>';
}
if ($_POST['submit']) {
if ($name != '' && $email != '') {
if ($human == '4') {
if (mail ($to, $subject, $body, $from)) {
echo '<p>Your message has been sent!</p>';
} else {
echo '<p>Something went wrong, go back and try again!</p>';
}
} else if ($_POST['submit'] && $human != '4') {
echo '<p>You answered the anti-spam question incorrectly!</p>';
}
} else {
echo '<p>You need to fill in all required fields!!</p>';
}
}
?>
但是总是出现这些错误:
注意:未定义的索引:名称在C:'xampp'htdocs'bet4info' index .php on19行
注意:未定义的索引:电子邮件在C:'xampp'htdocs'bet4info' index .php第20行
注意:未定义的索引:消息在C:'xampp'htdocs'bet4info' index .php第21行
注意:未定义的索引:人类在C:'xampp'htdocs'bet4info' index .php第25行
注意:未定义的索引:提交在C:'xampp'htdocs'bet4info' index .php第29行
注意:未定义的索引:提交在C:'xampp'htdocs'bet4info' index .php第35行
注意:未定义的索引:提交在C:'xampp'htdocs'bet4info' index .php第38行
为什么会这样?
代替
$name = $_POST['name'];
if ($_POST['submit'] && $human == '4') {
使用$name = isset($_POST['name']) ? $_POST['name'] : '';
if (isset($_POST['submit']) && $human == '4') {
首先,您必须使用isset
函数进行检查:
if(isset($_POST['name']) && isset($_POST['email']) &&....)
{
// If isset then assign data to variable $name = $_POST['name'],...
}
else
{
// Redirect to the error page
}
就像这样,所有的变量都是一样的