phpは現在のURLを取得します

/*
 QQ:297003558
 http://blog.ddian.cn
 http://qita.in
 /*
function get_url() {
 $sys_protocal = isset($_SERVER['SERVER_PORT'] ) && $_SERVER['SERVER_PORT'] == '443' ? 'https://' : 'http://';
 $php_self = $_SERVER['PHP_SELF'] ? $_SERVER['PHP_SELF'] : $_SERVER['SCRIPT_NAME'];
 $path_info = isset($_SERVER['PATH_INFO']) ? $_SERVER['PATH_INFO'] : '';
 $relate_url = isset($_SERVER['REQUEST_URI']) ? $_SERVER['REQUEST_URI'] : $php_self.(isset($_SERVER['QUERY_STRING']) ? '?'.$_SERVER['QUERY_STRING'] : $path_info);
 return $sys_protocal.(isset($_SERVER[ 'HTTP_HOST']) $_SERVER['HTTP_HOST'] : '').$relate_url;
}