PHP - setcookie()不工作 [英] PHP – setcookie() not working
问题描述
我有这个页面设置一个cookie,并回到一个字符串,如果你选中一个复选框。字符串打印正确,但cookie从未设置,我不知道为什么。
< form action =< ?php echo $ _SERVER ['PHP_SELF']?> method =post>
< label for =checkbox>选项1:< / label>
< input type =checkboxname =checkboxid =checkbox>< br>
< input type =submitname =submitvalue =Submit>
< / form>
<?php
if(isset($ _ POST ['checkbox'])){
setcookie(cookie,on,time()+ 3600 * 24);
echo您选中了复选框,并且Cookie的值设置为:< br>;
}
else {
setcookie(cookie,off,time()+ 3600 * 24);
echo您没有选中复选框,并且Cookie的值设置为:< br>;
}
echo $ _COOKIE ['cookie'];
?>
有人知道上述代码为什么不起作用吗?
唯一的例外是 $ _ SESSION
当你调用 session_start()
时填充。
如果你需要这些值立即在$ _COOKIE,必须手动添加,例如
setcookie('cookie',$ value,....);
$ _COOKIE ['cookie'] = $ value;
I have this page that sets a cookie and echos out a string if you check a checkbox. The string prints correctly, but the cookie never gets set and I have no idea why.
<form action="<?php echo $_SERVER['PHP_SELF'] ?>" method="post">
<label for="checkbox">Option 1:</label>
<input type="checkbox" name="checkbox" id="checkbox"><br>
<input type="submit" name="submit" value="Submit">
</form>
<?php
if (isset($_POST['checkbox'])) {
setcookie("cookie", "on", time()+3600*24);
echo "You checked the checkbox and a cookie was set with a value of:<br>";
}
else {
setcookie("cookie", "off", time()+3600*24);
echo "You didn't check the checkbox and a cookie was set with a value of:<br>";
}
echo $_COOKIE['cookie'];
?>
Does anyone know why the above code does not work?
PHP superglobals are populated at script start-up time, and then are NOT modified or touched by PHP again for the life of the script. That means $_COOKIE
represents the cookies that were sent to the server in the http request that fired up the script. It will NOT show any cookies you've added/changed/deleted during the life of the script. Those changes will only show up on the NEXT request.
The only exception to this is $_SESSION
, which is populated when you call session_start()
.
If you need those values to be in $_COOKIE immediately, you'll have to add them manually, e.g.
setcookie('cookie', $value, ....);
$_COOKIE['cookie'] = $value;
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