#測(cè)試網(wǎng)址: http://localhost/blog/testurl.php?id=5

//獲取域名或主機(jī)地址
echo $_SERVER['HTTP_HOST']."<br>"; #localhost

//獲取網(wǎng)頁(yè)地址
echo $_SERVER['PHP_SELF']."<br>"; #/blog/testurl.php

//獲取網(wǎng)址參數(shù)
echo $_SERVER["QUERY_STRING"]."<br>"; #id=5

//獲取用戶代理
echo $_SERVER['HTTP_REFERER']."<br>";

//獲取完整的url
echo 'http://'.$_SERVER['HTTP_HOST'].$_SERVER['REQUEST_URI'];
echo 'http://'.$_SERVER['HTTP_HOST'].$_SERVER['PHP_SELF'].'?'.$_SERVER['QUERY_STRING'];

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解析url$url = 'https://www.sogou.com/sogou?dd=ddvalue&_asf=www.sogou.com&_ast=1565685988&w=01111xxx29900';

$arr = parse_url($url); //parse_url和parse_str看清楚了，略坑
echo json_encode($arr) .'<br>';echo $arr['query'] .'<br>';

輸出如下
{"scheme":"https","host":"www.sogou.com","path":"\/sogou","query":"dd=ddvalue&_asf=www.sogou.com&_ast=1565685988&w=01111xxx29900"}

dd=ddvalue&_asf=www.sogou.com&_ast=1565685988&w=01111xxx29900

如果想獲取獲取具體參數(shù)對(duì)$arr['query']進(jìn)一步分割

$queryParts = explode('&', $newStr);
$params = array();
foreach ($queryParts as $param) {
$item = explode('=', $param);
$params[$item[0]] = $item[1];
}

 $params中有key和value