无法从PHP中的浏览器清除缓存

问题描述：

<?php
$_SESSION['test']="demo";
echo $_SESSION['test'];
function clearBrowserCache() {
header("Expires: Mon, 26 Jul 1997 05:00:00 GMT");
header ("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");  
header ("Cache-Control: no-cache, must-revalidate");  
header ("Pragma: no-cache");
}
clearBrowserCache();
?>

我想制作一个可以清除缓存浏览器的php文件.我的代码有问题吗，请帮帮我:)

i want to make one php file which can clear cache browser. is that something wrong in my code please help me :)

答

在发送标头之前，您不应回显任何内容.

You should not echo anything before sending headers.

<?php
function clearBrowserCache() {
    header("Expires: Mon, 26 Jul 1997 05:00:00 GMT");
    header ("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");  
    header ("Cache-Control: no-cache, must-revalidate");  
    header ("Pragma: no-cache");
}
clearBrowserCache();

$_SESSION['test']="demo";
echo $_SESSION['test'];
?>

否则，请在php.ini

无法从PHP中的浏览器清除缓存

相关推荐