PHP获取当前页面URL函数实例

/* 获得当前页面url开始 */
function curpageurl() {
    $pageurl = 'http';
    if ($_server["https"] == "on") {    // 如果是ssl加密则加上“s”
        $pageurl .= "s";
    }
    $pageurl .= "://";
    if ($_server["server_port"] != "80") {
        $pageurl .= $_server["server_name"].":".$_server["server_port"].$_server["request_uri"];
    } else {
        $pageurl .= $_server["server_name"].$_server["request_uri"];
    }
    return $pageurl;
}
/* 获得当前页面url结束 */

//获取域名或主机地址 
echo $_server['http_host']."<br>"; #localhost
 
//获取网页地址 
echo $_server['php_self']."<br>"; #/blog/testurl.php
 
//获取网址参数 
echo $_server["query_string"]."<br>"; #id=5
 
//获取用户代理 
echo $_server['http_referer']."<br>";
 
//获取完整的url
echo 'http://'.$_server['http_host'].$_server['request_uri'];
echo 'http://'.$_server['http_host'].$_server['php_self'].'?'.$_server['query_string'];
#http://localhost/blog/testurl.php?id=5
 
//包含端口号的完整url
echo 'http://'.$_server['server_name'].':'.$_server["server_port"].$_server["request_uri"]; 
#http://localhost:80/blog/testurl.php?id=5
//只取路径
$url='http://'.$_server['server_name'].$_server["request_uri"]; 
echo dirname($url);
#http://localhost/blog