[英]How can I display the error message after submitting the form in php?
我有一個網頁,在選擇后顯示內容,它包含一個帶有提交按鈕的表單。 單擊提交按鈕后,我想在上一頁中顯示錯誤消息。 這是代碼:
//form is sending email through action:"email.php". Code in php file:
mail ($to, $subject, $mess);
//set the error session...(I left out the form validation code to simplify)
$_SESSION["Login.Error"] = "Invalid credentials";
//go back to previous page with all previous selections
$previousPage = $_SERVER['HTTP_REFERER'];
header("Location: $previousPage");
在表單中,我添加了以下代碼以顯示錯誤消息:
<p class="form-text text-muted">Error Message:
<?php if(isset($_SESSION['Login.Error'])) {
echo $_SESSION['Login.Error'];
unset($_SESSION['Login.Error']); }
?>
</p>
按下提交后,上一頁正在加載OK,但錯誤信息沒有顯示,所以$ _SESSION我猜錯了。 或者這與$ _SERVER ['HTTP_REFERER']有關嗎? 有人可以幫忙嗎?
你可以使用session_start();
session_start();
mail ($to, $subject, $mess);
//set the error session...(I left out the form validation code to simplify)
$_SESSION["Login.Error"] = "Invalid credentials";
//go back to previous page with all previous selections
$previousPage = $_SERVER['HTTP_REFERER'];
header("Location: $previousPage")
/ * referer page * /
<?php session_start();?>
<p class="form-text text-muted">Error Message:
<?php if(isset($_SESSION['Login.Error'])) {
echo $_SESSION['Login.Error'];
unset($_SESSION['Login.Error']); }
?>
</p>
您需要按照以下代碼啟動會話。
<?php
session_start();
mail ($to, $subject, $mess);
$_SESSION["Login.Error"] = "Invalid credentials";
$previousPage = $_SERVER['HTTP_REFERER'];
header("Location: $previousPage");
?>
在表單中,我添加了以下代碼以顯示錯誤消息:
<p class="form-text text-muted">Error Message:
<?php
session_start();
if(isset($_SESSION['Login.Error'])) {
echo $_SESSION['Login.Error'];
unset($_SESSION['Login.Error']);
}
?>
</p>
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.