function url(){
if(isset($_SERVER['HTTPS'])){
$protocol = ($_SERVER['HTTPS'] && $_SERVER['HTTPS'] != "off") ? "https" : "http";
}
else{
$protocol = 'http';
}
return $protocol . "://" . $_SERVER['HTTP_HOST'];
}
function url(){
if(isset($_SERVER['HTTPS'])
阅读背景：
PHP如何获取基域/ url？
来源：互联网
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