使用PHP更改基于URI的href

Question

I'm trying to make a main menu bar link dynamic, based on the visitor's current page.

I started with

 $path = $_SERVER['REQUEST_URI'];

Which, of course, returns things like

• /subfolder/page.html
• /subfolder1/subfolder2/page.html
• /page.html

I need to grab whatever is after the first '/'. I've tried messing around with explode, but I stumble with what to do with the resulting array. I'm also going cross-eyed trying to write a regex - seems a more elegant solution.

Then I need to build my switch. Something along the lines of:

switch ($path)
{
case '/subfolder0':
  $link = $root_url.'/subfolder0/anotherfolder/page.html';
  break;
case '/subfolder1':
  $link = $root_url.'/subfolder1/page.html';
  break;
default:
  $link = $root_url.'/subfolder2/page.html';
}

Finally, should I be using if...elseif for this in lieu of switch?

Thanks for your time, all!

Answer 1

To grab everything after the first /:

strstr($_SERVER['REQUEST_URI'], '/');

Or, with regex:

preg_match('#(/.*)#', $_SERVER['REQUEST_URI'], $matches);  // $matches[1] will be the path

As far as the switch, I'd say if/elseif/else is the least-elegant in your case, switch isn't bad, but personally I'd go with an associative array:

$mapping = array('/subfolder0' => $root_url.'/subfolder0/anotherfolder/page.html', 'etc' => 'etc');
$link = $mapping($path);

This lets you keep the mapping in another file for organization, and makes it a little bit easier to maintain by separating configuration from implementation.