PHP - preg_replace删除斜杠和之后

Question

Well, i want remove slash and rest of url after domain name. in this code:

$url = $_POST['url'];
$result = preg_replace('#/[^/]*$#', '', $url);
echo $result;

it will remove slash and after it (/index.php), but only when URL be something like this:

http://site.domain/index.php

but in this:

http://site.domain/index/test

or more slashes it will only remove last slash and trail (/test).

I want remove first slash after domain:

Example:

http://site.domain/index/test/test/test/test/test/test

Remove:

/index/test/test/test/test/test/test

Result:

http://site.domain

I don't know how to define first slash after domain and trails. Second problem is when url is:

http://test.domain

it will remove /test.com but i never want this, i want when url hasn't any slash after domain name it DO NOT remove second slash from http:// ! well, i know i should define that remove first slash after domain or in other hand first slash in path or php self.

Answer 1

How about:

$result = preg_replace('#((?:https?://)?[^/]*)(?:/.*)?$#', '$1', $url);

This will kepp everything that is before the first slash (after http:// if present)