remove everything after the last symbol

[matthew9090]

lets say i have this string: dir/dir/dir/dir/dir

 

how would i remove everything after the last '/' sign so it outputs this: dir/dir/dir/dir (and removes the '/' symbol aswell)

 

<?php
//something like this
$str = "dir/dir/dir";
$replace = //do something
echo $replace;
?>

 

EDIT: i found the solution

<?php
$str = "dir/dir/dir";
$replace = dirname($str);
?>