[英]form action is another page(php code) how to validate the form and display error message in view page
當表單操作是另一個頁面（php 代碼）時，php 中的表單驗證。 如何驗證表單並在視圖頁面中顯示錯誤消息？
查看頁面
<html>
<body>
<form action="redirect.php" method="POST" enctype="multipart/form-data">
<label for="name"><b>Name: </b></label>
<input type="text" name="name" id="name" >
<br>
<label for="email"><b>Email: </b></label>
<input type="text" name="email" id="email" >
<br>
<label for="email"><b>Project Type: </b></label>
<input type="text" name="projecttype" id="projecttype">
<br>
<label for="email"><b>Project Description: </b></label>
<input type="text" name="pdescription" id="pdescription" >
<br>
<label for="file"><b>File Upload: </b></label>
<input type="file" name="file" id="file">
<br>
<div class="clearfix">
<input type="submit" name="submit1" id="submit1" value="submit1">
</div>
</form>
</body>
</html>
重定向.php
<?php
if(isset($_POST['submit1']))
{
$name=$_POST['name'];
$email=$_POST['email'];
$projecttype=$_POST['projecttype'];
$projectdetails=$_POST['pdescription'];
$attachment=$_FILES['file']['name'];
$tmp_name=$_FILES['file']['tmp_name'];
move_uploaded_file($tmp_name,"upload/".$attachment);
$query=mysql_query("insert into projectdetails(Customer_name,Customer_email,Customer_attachment,Customer_project_type,Customer_project_details) values('$name','$email','$attachment','$projecttype','$projectdetails')");
if($query)
{
header('Location: test2.php');
}
?>
name field required in php using session創建簡單的演示
你可以試試這種方式
form.php
<?php
session_start();
if(isset($_SESSION['msg'])){
$name=$_SESSION['msg']['name'];
}
?>
<html>
<body>
<form action="redirect.php" method="POST" enctype="multipart/form-data">
<label for="name"><b>Name: </b></label>
<input type="text" name="name" id="name" > <span style="color:red"><?php echo $name ?></span>
<br>
<label for="email"><b>Email: </b></label>
<input type="text" name="email" id="email" >
<br>
<label for="email"><b>Project Type: </b></label>
<input type="text" name="projecttype" id="projecttype">
<br>
<label for="email"><b>Project Description: </b></label>
<input type="text" name="pdescription" id="pdescription" >
<br>
<label for="file"><b>File Upload: </b></label>
<input type="file" name="file" id="file">
<br>
<div class="clearfix">
<input type="submit" name="submit1" id="submit1" value="submit1">
</div>
</form>
</body>
</html>
redirect.php
<?php
session_start();
if(isset($_POST['submit1']))
{
$name=$_POST['name'];
if(isset($name) && empty($name)){
$_SESSION['msg']['name']="Name must be required!";
header('location: form.php');
exit;
}
$email=$_POST['email'];
$projecttype=$_POST['projecttype'];
$projectdetails=$_POST['pdescription'];
$attachment=$_FILES['file']['name'];
$tmp_name=$_FILES['file']['tmp_name'];
move_uploaded_file($tmp_name,"upload/".$attachment);
$query=mysql_query("insert into projectdetails(Customer_name,Customer_email,Customer_attachment,Customer_project_type,Customer_project_details) values('$name','$email','$attachment','$projecttype','$projectdetails')");
if($query)
{
header('Location: test2.php');
}
}
?>
有很多方法可以做到這一點，我建議使用 HTML5 的簡單方法
<script src="http://code.jquery.com/jquery-1.9.1.js"></script> $(function () { $('form').bind('click', function (event) { event.preventDefault(); $.ajax({ type: 'POST', url: 'post.php', data: $('form').serialize(), success: function () { alert('form was submitted'); } }); }); }); <html> <body> <form action="redirect.php" method="POST" enctype="multipart/form-data"> <label for="name"><b>Name: </b></label> <input type="text" name="name" id="name" required> <br> <label for="email"><b>Email: </b></label> <input type="email" name="email" id="email" required> <br> <label for="email"><b>Project Type: </b></label> <input type="text" name="projecttype" id="projecttype" required> <br> <label for="email"><b>Project Description: </b></label> <input type="text" name="pdescription" id="pdescription" required> <br> <label for="file"><b>File Upload: </b></label> <input type="file" name="file" id="file" required> <br> <div class="clearfix"> <input type="submit" name="submit1" id="submit1" value="submit1"> </div> </form> </body> </html>在 PHP 頁面中：
if(empty($_POST['name'])){
echo "Name is required";
}
在重定向之前在會話中設置錯誤，在視圖頁面上回顯它們，然后在 redirect.php 頂部取消設置錯誤，通過在頂部取消設置，您將確保始終擁有最新的錯誤消息。
您的代碼中存在嚴重問題
可以在您的代碼中完成的微調
一些例子給你
如果您需要繼續當前的實施
聲明一個名為$formavalid的變量並相應地使其為真和假
<html>
<body>
<?php
$formvalid = true;
?>
<form action="redirect.php" method="POST" enctype="multipart/form-data">
<label for="name"><b>Name: </b></label>
<input type="text" name="name" id="name" >
<br>
<label for="email"><b>Email: </b></label>
<input type="text" name="email" id="email" >
<?php
//Do like this for all fields
if(isset($_POST['submit1']))
{
if(!isset($_POST['email']))
{
echo 'Email field is missing';
}else{
$formvalid = false;// Make the $formvalid as false if your input is dirty
}
}
<br>
<label for="email"><b>Project Type: </b></label>
<input type="text" name="projecttype" id="projecttype">
<br>
<label for="email"><b>Project Description: </b></label>
<input type="text" name="pdescription" id="pdescription" >
<br>
<label for="file"><b>File Upload: </b></label>
<input type="file" name="file" id="file">
<br>
<div class="clearfix">
<input type="submit" name="submit1" id="submit1" value="submit1">
</div>
</form>
<?php
if($formvalid==true){
//Form is valid so do the action for it
}else{
//form is not valid, so let the user input to make it valid
}
?>
</body>
</html>
希望，這對你有幫助
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