在第二次斜线后剥去一切

If I have the following URL:

http://www.mysite.com/games/topgame

how do i use php to remove everything after the last "/"?

So I would be left with:

http://www.mysite.com/games/

I have tried this:

    $currentUrl = 'http://www.mysite.com/games/topgame';     
    $newstr = substr($currentUrl, 0, strpos($currentUrl, '/', strpos($currentUrl, '/')+4));

Try this code...

$currentUrl = 'http://www.mysite.com/games/topgame';     
$newstr = substr($currentUrl, 0, strrpos($currentUrl, '/'));

See Codepad.

  $newstr = substr($currentUrl, 0, strrchr($currentUrl, '/');

Try this:

<?php
print_r (dirname('http://www.mysite.com/games/topgame'));
?>

There are several functions to pick out parts from a path.

like:

• basename() - Returns trailing name component of path
• pathinfo() - Returns information about a file path
• realpath() - Returns canonicalized absolute pathname

but maybe pathinfo() is best suited for your needs:

<?php
$file = 'http://www.mysite.com/games/topgame/cool.php';

$path_parts = pathinfo($file);

echo $path_parts['dirname'] . "<br />";
echo $path_parts['basename'] . "<br />";
echo $path_parts['extension'] . "<br />";
echo $path_parts['filename'] . "<br />"; // since PHP 5.2.0

?>

Output:

http://www.mysite.com/games/topgame
cool.php
php
cool

Start searching here... http://se1.php.net/manual/en/function.pathinfo.php