目前我创建了预订表单。问题是，如果用户填写表单不正确，它会将整个页面更改为错误消息和重新输入表单的链接。然后表单重置为空。
这是部分代码
if (!preg_match('/^[0-9]{4}-(0[1-9]|1[0-2])-(0[1-9]|[1-2][0-9]|3[0-1])$/', $_POST['dor']))
{
echo 'Input your Date of Reservation correctly!';
?>
Click <a href="reservation.php">here</a> to try again!
<?php
exit();
}
else if (!preg_match('/^[a-z A-Z]{3,30}$/', $_POST['fullname']))
{
echo 'Input your full name correctly!!';
?>
</br>
Click <a href="reservation.php">here</a> to try again!
<?php
exit();
}
else if (!preg_match('/^[0-9]\d{9}$/', $_POST['contactno']))
{
echo 'Enter your contact number correctly!!';
?>
</br>
Click <a href="reservation.php">here</a> to try again!
<?php
exit();
}
else if (!preg_match('/^[0-9]{4}-(0[1-9]|1[0-2])-(0[1-9]|[1-2][0-9]|3[0-1])$/', $_POST['dco']))
{
echo 'Input your Check-out date correctly!';
?>
Click <a href="reservation.php">here</a> to try again!
<?php
exit();
}
else if (strtotime($_POST['dor']) < time())
{
echo 'Date of reservation cannot be in the past!';
?>
</br>
Click <a href="reservation.php">here</a> to try again!
<?php
exit();
}
else if (strtotime($_POST['dco']) < strtotime($_POST['dor']))
{
echo 'Check-out date cannot be before Date of Reservation!';
?>
</br>
Click <a href="reservation.php">here</a> to try again!
<?php
exit();
}
我刚尝试在echo部分使用此代码
else if (!preg_match('/^[0-9]\d{9}$/', $_POST['contactno']))
{
echo "<script type='text/javascript'>alert('Enter your contact number correctly')</script>";
exit();
}
弹出窗口显示但页面变为空白。现在我想更改为显示弹出消息而不将表单重置为空
它的正确代码是什么？
已更新
我正在使用iframe，并且弹出窗口有效，但是一旦我正确输入数据，名为view_reservation()的函数就不起作用了。因此，数据已成功记录到数据库中，但无法查看预订摘要
这是完整的代码
<?php
include 'core/init.php';
protect_page();
include 'includes/overall/header.php' ;
//if form is being submitted
if(empty($_POST)=== false)
{
//to validate whether user enters smtg or not otherwise no point continue to do the next validation
//create an array
$required_fields = array ('user_id','fullname','contactno','passport','dor','dco');
foreach($_POST as $key=>$value)
{
//if the key (value) in array of $required_fields is true which is empty
if(empty($value) && in_array ($key, $required_fields) === true )
{
$errors[] = 'You must filled up all of the fields';
//the validation can happen to more than 1 field
break 1;
}
}
if(empty($errors) === true)
{
if (!preg_match('/^[0-9]{4}-(0[1-9]|1[0-2])-(0[1-9]|[1-2][0-9]|3[0-1])$/', $_POST['dor']))
{
?>
<script>alert('Input date of reservation correctly');</script>
<?php
exit();
}
else if (!preg_match('/^[a-z A-Z]{3,30}$/', $_POST['fullname']))
{
?>
<script>alert('Input your full name correctly');</script>
<?php
exit();
}
else if (!preg_match('/^[0-9]\d{9}$/', $_POST['contactno']))
{
?>
<script>alert('Enter Contactno correctly');</script>
<?php
exit();
}
else if (!preg_match('/^[0-9]{4}-(0[1-9]|1[0-2])-(0[1-9]|[1-2][0-9]|3[0-1])$/', $_POST['dco']))
{
?>
<script>alert('Input your check-out date correctly');</script>
<?php
exit();
}
else if (strtotime($_POST['dor']) < time())
{
?>
<script>alert('Reservation date cannot in the past!!');</script>
<?php
exit();
}
else if (strtotime($_POST['dco']) < strtotime($_POST['dor']))
{
?>
<script>alert('Check-out date cannot before the reservation date!!');</script>
<?php
exit();
}
}
}
//what does this line does is that to check whether success is in the end of the URL
if(isset($_GET['success']) && empty($_GET['success']))
{
view_reservation();
}
else
{//if there are no errors
if (empty($_POST) === false && empty($errors) === true)
{
check_availability();
}
//
else if (empty($errors) === false)
{
echo output_errors($errors);
}
?>
<link rel="stylesheet" type="text/css" media="all" href="jsDatePick_ltr.min.css" />
<script type="text/javascript" src="js/jsDatePick.min.1.3.js"></script>
<script type="text/javascript">
window.onload = function(){
new JsDatePick({
useMode:2,
target:"dor",
dateFormat:"%Y-%m-%d"
});
new JsDatePick({
useMode:2,
target:"dco",
dateFormat:"%Y-%m-%d"
});
};
</script>
<h1 style="font-family: 'Gill Sans', 'Gill Sans MT', 'Myriad Pro', 'DejaVu Sans Condensed', Helvetica, Arial, sans-serif">RESERVATION </h1>
<span style="font-family: 'Gill Sans', 'Gill Sans MT', 'Myriad Pro', 'DejaVu Sans Condensed', Helvetica, Arial, sans-serif">
<form action="" method="post" target="ifr">
<fieldset>
</span>
<legend>
<span style="font-family: 'Gill Sans', 'Gill Sans MT', 'Myriad Pro', 'DejaVu Sans Condensed', Helvetica, Arial, sans-serif"><font size="6">Please input your information correctly</font> </span></legend>
<p>
<iframe name="ifr" id="ifr" style="display:none"></iframe>
<form action="" method="post" >
<ul>
<li>
Full name*: <br>
<input type="text" name="fullname">
</li>
<li>
Contact No.: <br>
<input type="text" name="contactno">
</li>
<li>
IC/Passport*: <br>
<input type="text" name="passport">
</li>
<li>
Room Type*: <br>
<select name="roomtype" id="roomtype">
<option value="">Select</option>
<option value="Single">Single (RM 100)</option>
<option value="Superior">Superior (RM 200)</option>
<option value="Deluxe">Deluxe (RM 300)</option>
</select>
</li>
<br>
<li>
Date of reservation*: <br>
<input type="text" size="12" id= "dor" name="dor"/>
</li>
<li>
Check-out Date*: <br>
<input type="text" size="12" id= "dco" name="dco"/>
</li>
<input type="submit" value="Submit">
<input type="reset" value="Clear" >
<li>
<br>
<br>
<br>
<br>
<br>
<br>
</ul>
</form>
<?php
}
include 'includes/overall/footer.php' ;
?>
答案 0 :(得分：1)
如果您不想丢失表单数据，在提交表单后，有很多方法可以执行此操作。其中一个人正在使用iframe
只需将其放入您的html代码
即可<iframe name="ifr" id="ifr" style="display:none">
并在您的表单标记中放置目标，如下所示
<form ...your code... target="ifr">
现在，您在表单提交后不会丢失表单数据
<强> 更新
OP请求的示例代码
<iframe name="ifr" id="ifr" style="display:none"></iframe>
<form name="form1" method="POST" target="ifr">
<input type="text" name="email">
<input type="submit" name="submit" value="submit">
<?php
if(isset($_POST['submit']))
{
if(empty($_POST['email']))
{
?>
<script>alert('Enter Email');</script>
<?php
}
}
?>
工作（测试）
<强> UPDATE2
你的代码是不同的，很抱歉这个iframe可能不会帮助你所以使用其他简单的替代方案并回滚你做过的事情
将session_start();放在表单的起始行
然后在你的表单元素中这样做
例如，如果你有像这样的输入元素
<input type="text" name="contact">
然后将session作为其值放入其中，如下面的
<input type="text" name="contact" value="<?=$_SESSION['contact']?>">
并且在你的test.php页面中也将session_start();放在首发位置并按照这样做
$_SESSION = $_POST;
现在足够了，您不会在表单提交后丢失表单数据