How to remove path after domain name from string - php

Question

I have the following code :
function removeFilename($url)
{
$file_info = pathinfo($url);
return isset($file_info['extension'])
? str_replace($file_info['filename'] . "." . $file_info['extension'], "", $url)
: $url;
}
$url1 = "http://website.com/folder/filename.php";
$url2 = "http://website.com/folder/";
$url3 = "http://website.com/";
echo removeFilename($url1); //outputs http://website.com/folder/
echo removeFilename($url2);//outputs http://website.com/folder/
echo removeFilename($url3);//outputs http:///
Now my problem is that when there is only only a domain without folders or filenames my function removes website.com too.
My idea is there is any way on php to tell my function to do the work only after third slash or any other solutions you think useful.

Answer 1

UPDATED : ( working and tested )
<?php
function removeFilename($url)
{
$parse_file = parse_url($url);
$file_info = pathinfo($parse_file['path']);
return isset($file_info['extension'])
? str_replace($file_info['filename'] . "." . $file_info['extension'], "", $url)
: $url;
}
$url1 = "http://website.com/folder/filename.com";
$url2 = "http://website.org/folder/";
$url3 = "http://website.com/";
echo removeFilename($url1); echo '<br/>';
echo removeFilename($url2); echo '<br/>';
echo removeFilename($url3);
?>
Output:
http://website.com/folder/
http://website.org/folder/
http://website.com/

Answer 2

Sounds like you are wanting to replace a substring and not the whole thing. This function might help you:
http://php.net/manual/en/function.substr-replace.php

Answer 3

Since filename is at last slash you can use substr and str_replace to remove file name from path.
$PATH = "http://website.com/folder/filename.php";
$file = substr( strrchr( $PATH, "/" ), 1) ;
echo $dir = str_replace( $file, '', $PATH ) ;
OUTPUT
http://website.com/folder/

Answer 4

pathinfo cant recognize only domain and file name. But if without filename url is ended by slash
$a = array(
"http://website.com/folder/filename.php",
"http://website.com/folder/",
"http://website.com",
);
foreach ($a as $item) {
$item = explode('/', $item);
if (count($item) > 3)
$item[count($item)-1] ='';;
echo implode('/', $item) . "\n";
}
result
http://website.com/folder/
http://website.com/folder/
http://website.com

Answer 5

Close to the answer of splash58
function getPath($url) {
$item = explode('/', $url);
if (count($item) > 3) {
if (strpos($item[count($item) - 1], ".") === false) {
return $url;
}
$item[count($item)-1] ='';
return implode('/', $item);
}
return $url;
}