如何使用会话将值从一个 php 页面传递到另一个页面
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how to pass value from one php page to another using session
提问by A Mohammed Hussain
I can pass values form one page to another but I need to pass value like this,
我可以将值从一页传递到另一页，但我需要像这样传递值，
Page 1:
第 1 页：
Page4.php
第4页.php
Page3.php
第3页.php
I need to pass the value in a text field in the Page1.php to a text field in Page2.php, since the form is not directly redirectly to page2, I am unable to pass the value, I tried session, form post method and few other methods but I am yet to succeed.
我需要将 Page1.php 中的文本字段中的值传递给 Page2.php 中的文本字段，因为表单没有直接重定向到 page2，我无法传递该值，我尝试了 session、form post 方法和其他方法很少，但我还没有成功。
I would be very happy if you can help me with the code or some suggestions.
如果您能帮助我提供代码或一些建议，我将非常高兴。
Thanks!
谢谢！
Edit..........
编辑..........
I found the answer, thanks for the help, it was actually a careless mistake on my part, I used $_post instead of $_session.
我找到了答案，感谢您的帮助，这实际上是我的一个粗心大意的错误，我使用了 $_post 而不是 $_session。
Its working now.
它现在工作。
Thanks for the help.
谢谢您的帮助。
回答by Fluffeh
Use something like this:
使用这样的东西：
page1.php
页面1.php
<?php
session_start();
$_SESSION['myValue']=3; // You can set the value however you like.
?>
Any other PHP page:
任何其他 PHP 页面：
<?php
session_start();
echo $_SESSION['myValue'];
?>
A few notes to keep in mind though: You need to call session_start()BEFORE any output, HTML, echos - even whitespace.
不过要记住一些注意事项：您需要session_start()在任何输出、HTML、回声之前调用- 甚至是空格。
You can keep changing the value in the session - but it will onlybe able to be used after the first page - meaning if you set it in page 1, you will not be able to use it until you get to another page or refresh the page.
您可以在会话中不断更改该值 - 但它只能在第一页之后使用 - 这意味着如果您在第 1 页中设置它，您将无法使用它，直到您到达另一个页面或刷新页。
The setting of the variable itself can be done in one of a number of ways:
变量本身的设置可以通过多种方式之一完成：
$_SESSION['myValue']=1;
$_SESSION['myValue']=$var;
$_SESSION['myValue']=$_GET['YourFormElement'];
And if you want to check if the variable is set before getting a potential error, use something like this:
如果您想在出现潜在错误之前检查变量是否已设置，请使用以下内容：
if(!empty($_SESSION['myValue'])
{
echo $_SESSION['myValue'];
}
else
{
echo "Session not set yet.";
}
回答by Chris
Solution using just POST - no $_SESSION
仅使用 POST 的解决方案 - 没有 $_SESSION
page1.php
页面1.php
<form action="page2.php" method="post">
<textarea name="textarea1" id="textarea1"></textarea><br />
<input type="submit" value="submit" />
</form>
page2.php
页面2.php
<?php
// this page outputs the contents of the textarea if posted
$textarea1 = ""; // set var to avoid errors
if(isset($_POST['textarea1'])){
$textarea1 = $_POST['textarea1']
}
?>
<textarea><?php echo $textarea1;?></textarea>
Solution using $_SESSION and POST
使用 $_SESSION 和 POST 的解决方案
page1.php
页面1.php
<?php
session_start(); // needs to be before anything else on page to use $_SESSION
$textarea1 = "";
if(isset($_POST['textarea1'])){
$_SESSION['textarea1'] = $_POST['textarea1'];
}
?>
<form action="page1.php" method="post">
<textarea name="textarea1" id="textarea1"></textarea><br />
<input type="submit" value="submit" />
</form>
<br /><br />
<a href="page2.php">Go to page2</a>
page2.php
页面2.php
<?php
session_start(); // needs to be before anything else on page to use $_SESSION
// this page outputs the textarea1 from the session IF it exists
$textarea1 = ""; // set var to avoid errors
if(isset($_SESSION['textarea1'])){
$textarea1 = $_SESSION['textarea1']
}
?>
<textarea><?php echo $textarea1;?></textarea>
WARNING!!! - This contains no validation!!!
警告！！！- 这不包含验证！！！
