PHP中获取页面的URL

var_dump($_SERVER);die();

array (size=42)  'HTTP_HOST' => string 'localhost' (length=9)  'HTTP_CONNECTION' => string 'keep-alive' (length=10)  'CONTENT_LENGTH' => string '377' (length=3)  'HTTP_CACHE_CONTROL' => string 'max-age=0' (length=9)  'HTTP_ACCEPT' => string 'text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8' (length=74)  'HTTP_ORIGIN' => string 'http://localhost' (length=16)  'HTTP_UPGRADE_INSECURE_REQUESTS' => string '1' (length=1)  'HTTP_USER_AGENT' => string 'Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/49.0.2623.221 Safari/537.36 SE 2.X MetaSr 1.0' (length=127)  省略......

以上信息可以找到想要的当前URL地址

然后再进行拼接成一个完整的URL

$url = 'http://'.$_SERVER['HTTP_HOST'].连接后续参数