explode() form the right instead of the left!

[BPG]

Hi there,

I need to strip the last part of a URL.

example: http://www.example.com/dir1/dir2/greetz.html
needed result: http://www.example.com/dir1/dir2

I wanted to do this by using explode '/', only I don't know how many
times '/' occurs in the URL so I want to start 'explode' from the
right instead of the left (so the 'first explode' is the 'greetz.html'
part)

I’m almost sure it's possible, just can’t remember or find how to do
this, can someone please help me out?

Thanks in advance,
Grtz
Bob

[BPG]

ok never mind, i still don't know how to start explode() from the
right but for me the question is solved by using "dirname()".. (http://
nl.php.net/dirname)

Sometimes I’m just searing in the wrong direction...

thanks
Bob

[Curtis Dyer]

Indeed, that would be the easier approach. However, in case you're
curious about the explode() question, I thought I'd follow-up.

I don't think you can explictly explode() from right to left, but you
can reverse the string passed to explode():

$tokens = explode(' ', strrev($s));

--
Curtis
$email = str_replace('sig.invalid', 'gmail.com', $from);

[sheldonlg]

Curtis Dyer wrote:
> BPG <ma...@bpg.nu> wrote:
>> ok never mind, i still don't know how to start explode() from the
>> right but for me the question is solved by using "dirname()".. (http://
>> nl.php.net/dirname)
>>
>> Sometimes I’m just searing in the wrong direction...
>>
>> thanks
>> Bob
>
> Indeed, that would be the easier approach. However, in case you're
> curious about the explode() question, I thought I'd follow-up.
>
> I don't think you can explictly explode() from right to left, but you
> can reverse the string passed to explode():
>
> $tokens = explode(' ', strrev($s));
>

You can also do

substr($string, strrpos($string, '/') + 1);

[BPG]

tnx for the follow-up’s, both solutions are new to me! :)

I was indeed still curious about a solution for the first approach
(start explode() from the right). I was almost sure I did use
someting
like that in de past so I went looking in some of my older php
scripts
and didn't found exactly where I was looking for, the approach I used
about a year ago was using 'end' function (http://nl.php.net/end),

example
$url = 'http://www.example.com/dir1/dir2/greetz.html ';
echo end(explode("/", $url)); // greetz.html

Thanks again,
Bob

[prasath_linux]

$string = "http://in.php.net/manual/en/function.strrev.php";

print substr($string, 0, (strrpos($string, '/')+1));

Output : http://in.php.net/manual/en/

["Álvaro G. Vicario"]

BPG escribió:

> I need to strip the last part of a URL.
>
> example: http://www.example.com/dir1/dir2/greetz.html
> needed result: http://www.example.com/dir1/dir2
>
> I wanted to do this by using explode '/', only I don't know how many
> times '/' occurs in the URL so I want to start 'explode' from the
> right instead of the left (so the 'first explode' is the 'greetz.html'
> part)

dirname() works quite well:

echo dirname('http://www.example.com/dir1/dir2/greetz.html') . "\n";
echo dirname('http://www.example.com/dir1/dir2/') . "\n";
echo dirname('http://www.example.com/dir1/dir2') . "\n";

... prints:

http://www.example.com/dir1/dir2
http://www.example.com/dir1
http://www.example.com/dir1

--
-- http://alvaro.es - Álvaro G. Vicario - Burgos, Spain
-- Mi sitio sobre programación web: http://bits.demogracia.com
-- Mi web de humor al baño María: http://www.demogracia.com
--

[sheldonlg]

He wants the LAST piece, so as I posted earlier:

substr($string, (strrpos($string, '/')+1));

[sheldonlg]

Pliease ignore my last post. He actually DID want the front piece, not
the last piece.

[Dispatch Rabbi]

On Feb 24, 4:24 pm, Curtis Dyer <dye...@sig.invalid> wrote:
> Indeed, that would be the easier approach.  However, in case you're
> curious about the explode() question, I thought I'd follow-up.
>
> I don't think you can explictly explode() from right to left, but you
> can reverse the string passed to explode():
>
> $tokens = explode(' ', strrev($s));

If you apply that to, say, "cat dog chair", you'd get array('riahc',
'god', 'tac').

Instead, just try:
$tokens = array_reverse(explode(YOUR_DELIMITER, $string)); //
YOUR_DELIMITER is '/' in the original problem.

Or, if you were interested in keeping everything but the last token:
$tokens = explode(YOUR_DELIMITER, $string);
array_pop($tokens); // used in a void context to throw the end away
$string = implode(YOUR_DELMITER, $tokens);

But in this particular case, dirname() is a handy solution, and the
substr solutions are neater and quicker.

[Curtis Dyer]

Absolutely right, thanks for catching that. No idea what I was
thinking.