在php.ini中error_reporting = E_ALL的情况下,输出内容之后再setcookie会弹出以下提示:
复制代码 代码如下:
Warning: Cannot modify header information – headers already sent by (output started at C:\xampp\htdocs\b.php:2) in … on line …
但因为当时php.ini设置成了error_reporting = E_ALL & ~E_NOTICE,于是没有任何提示,所以开发的时候还是建议设成error_reporting = E_ALL 方便观察到一些异常情况。
附一个setcookie用法实例
a.php
复制代码 代码如下:
setcookie("page", "//m.sbmmt.com/m/article/a.php");
$page = $_COOKIE["page"] ? $_COOKIE["page"] : "unknown";
echo "From " . $page . "
";
?>
This is a.php. Go to b.php
b.php
复制代码 代码如下:
setcookie("page", "//m.sbmmt.com/m/article/b.php");
$page = isset($_COOKIE["page"]) ? $_COOKIE["page"] : "unknown";
echo "From " . $page . "
";
?>
This is b.php. Go to a.php