php 从php表单获取cookie值
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getting cookie value from php form
提问by Lenn
what do I set the cookie value and name to be for a value a user may enter in a form? and what do i use to display that value on my second page? (I can't not use cookies for this, so while there may be a smarter way to do this, I would just like to know how to do it with cookies!!) Thanks!
对于用户可以在表单中输入的值，我应该如何设置 cookie 值和名称？我用什么来在我的第二页上显示该值？（为此我不能不使用 cookie，所以虽然可能有更聪明的方法来做到这一点，但我只想知道如何使用 cookie 来做到这一点！！）谢谢！
<?php
setcookie($color, 'color');
setcookie($name, 'name');
?>
<?php
echo "<form action=\"form_data.php\" method=\"post\">";
echo "favorite color:<input type=\"text\" name=\"color\" size=\"20\"><br/>";
echo "name:<input type=\"text\" name=\"name\" size=\"20\"><br/>";
echo "<input type=\"submit\" value=\"Submit\" />";
echo "<br /><input type=\"hidden\" name=\"submitted\" value=\"true\" />";
?>
data on form_data:
form_data 上的数据：
<?php
echo "<b>fav color:</b>".$_COOKIE['color'];
echo "<b>name:</b>".$_COOKIE['name'];
?>
回答by baraboom
First, you have your form:
首先，你有你的表格：
<?php
echo "<form action=\"form_data.php\" method=\"post\">";
echo "favorite color:<input type=\"text\" name=\"color\" size=\"20\"><br/>";
echo "name:<input type=\"text\" name=\"name\" size=\"20\"><br/>";
echo "<input type=\"submit\" value=\"Submit\" />";
echo "<br /><input type=\"hidden\" name=\"submitted\" value=\"true\" />";
?>
Then in form_data.php:
然后在 form_data.php 中：
<?php
// set the cookie with the submitted user data
setcookie('color',$_POST['color']);
setcookie('name', $_POST['name']);
echo "<b>fav color:</b>".$_COOKIE['color'];
echo "<b>name:</b>".$_COOKIE['name'];
?>
However, you'll notice that the $_COOKIE variables are not available yet... if you reload that page, they will appear.
但是，您会注意到 $_COOKIE 变量尚不可用……如果您重新加载该页面，它们将出现。
In order to accomodate this behavior of cookies, you can setup a redirect in form_data.php:
为了适应 cookie 的这种行为，您可以在 form_data.php 中设置重定向：
<?php
if (!empty($_POST)) {
// set the cookie with the submitted user data
setcookie('color',$_POST['color']);
setcookie('name', $_POST['name']);
// redirect the user to final landing page so cookie info is available
header("Location:form_data.php");
} else {
echo "<b>fav color:</b>".$_COOKIE['color'];
echo "<b>name:</b>".$_COOKIE['name'];
}
?>
You can redirect them anywhere suitable. Hope this helps and good luck!
您可以将它们重定向到任何合适的地方。希望这会有所帮助，祝你好运！
回答by Trieu Nguyen
function setcookie of your question fail. setcookie($name, $value);
您的问题的功能 setcookie 失败。setcookie($name, $value);
Ex: setcookie('color', 'red');
例如： setcookie('color', 'red');
echo $_COOKIE['color']; //outout: red
回声 $_COOKIE['颜色']; //输出：红色
回答by Nickool
I don't know why you want to use cookies.as I know you can use sessions for passing the information of users like this: It is the full example that is working for me
我不知道您为什么要使用 cookie。因为我知道您可以使用会话来传递这样的用户信息：这是对我有用的完整示例
<?php
session_start();
if(array_key_exists('sub',$_POST))
$_SESSION['name']=$_POST['name'];
?>
<html>
<form method="post">
<input type='text' name="name">
<input type='submit' name='sub' value='send my info'>
</html>
and in another page just use this one:
在另一个页面中只需使用这个：
<?php
session_start();
$r=$_SESSION['name'];
echo $r;
?>
remember to call session_start(); on each page when you want to use sessions
记得调用 session_start(); 当您想使用会话时在每个页面上
回答by beacon
Can anyone explain what baraboom wrote:
谁能解释一下 baraboom 写了什么：
However, you'll notice that the $_COOKIE variables are not available yet... if you reload that page, they will appear.
但是，您会注意到 $_COOKIE 变量尚不可用……如果您重新加载该页面，它们将出现。
<?php
if (!empty($_POST)) {
// set the cookie with the submitted user data
setcookie('color',$_POST['color']);
setcookie('name', $_POST['name']);
// redirect the user to final landing page so cookie info is available
header("Location:form_data.php");
} else {
echo "<b>fav color:</b>".$_COOKIE['color'];
echo "<b>name:</b>".$_COOKIE['name'];
}
?>
Just trying to understand why it is like that since the user is redirected to the page on submit.
只是想了解为什么会这样，因为用户在提交时被重定向到页面。
