php 使用 $_SERVER['HTTPS'] 的未定义索引错误
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/4911532/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
Undefined index error using $_SERVER['HTTPS']
提问by Scott B
Debug is throwing...
调试正在抛出...
Notice: Undefined index: HTTPS in C:\xampplite\htdocs\testsite\wp-content\themes\mytheme\header.php on line 4
注意：未定义索引：HTTPS in C:\xampplite\htdocs\testsite\wp-content\themes\mytheme\header.php 第 4 行
How can I change my function below to prevent the error?
如何更改下面的函数以防止出现错误？
function curPageURL() {
$pageURL = 'http';
if ($_SERVER["HTTPS"] == "on") {$pageURL .= "s";}
}
Would this be the equivalent?
这会是等价的吗？
if ( isset( $_SERVER["HTTPS"] )) {$pageURL .= "s";}
回答by BoltClock
Some servers simply don't set $_SERVER['HTTPS']if the request is non-secure. Some others may set it to 'off'. You'll have to check it like this:
$_SERVER['HTTPS']如果请求不安全，一些服务器根本不会设置。其他一些人可能会将其设置为'off'。你必须像这样检查它：
if ( isset( $_SERVER["HTTPS"] ) && strtolower( $_SERVER["HTTPS"] ) == "on" ) {
$pageURL .= "s";
}
回答by Blender
Notice: Undefined index: HTTPSsays that HTTPSis not a key within the $_SERVERarray. It doesn't exist, so you can't compare it with "on".
Notice: Undefined index: HTTPS说这HTTPS不是$_SERVER数组中的键。它不存在，因此您无法将其与"on".
isset()checks whether a variable is "set" or even available for reference in this case. This would be the best choice in your case.
isset()在这种情况下，检查变量是否已“设置”或什至可供参考。这将是您的最佳选择。
