这里我有一小段PHP代码来拒绝访问一个页面，除非你来自两个页面(第1页和第2页)。但是它不工作，因为它根本不运行代码。
if($_SERVER['HTTP_REFERER'] != 'http://www.example.com/access.html' or $_SERVER['HTTP_REFERER'] != 'http://example.com/php/upload.php'){
header ('Location: http://example.com/php/retry.php');
exit;
}
您的条件总是true，使用in_array或&&
if ($_SERVER['HTTP_REFERER'] != 'http://www.example.com/access.html' && $_SERVER['HTTP_REFERER'] != 'http://example.com/php/upload.php') {
header(...);
}
或
if (!in_array($_SERVER['HTTP_REFERER'], array('http://www.example.com/access.html', 'http://example.com/php/upload.php')) {
header(...);
}
您还应该添加检查HTTP_REFERER是否为empty -
if (!empty($_SERVER['HTTP_REFERER']) && !in_array($_SERVER['HTTP_REFERER'], array('http://www.example.com/access.html', 'http://example.com/php/upload.php')) {
header(...);
}