strrpos and offset?

Hi,
I'm using PHP 4.3.4 the docs at:

http://uk.php.net/manual/en/function.strrpos.php

tells me that strrpos can be passed an offset as the third
argument.

Can it?

E.g. strrpos($page, "/", $lastslash);

And are there class descriptions/header files for php libraries
so that I can check the syntax.

Thanks,

Owen.

Owen Williams wrote:
> Hi,
> I'm using PHP 4.3.4 the docs at:
>
> http://uk.php.net/manual/en/function.strrpos.php
>
> tells me that strrpos can be passed an offset as the third
> argument.
>
> Can it?
>
> E.g. strrpos($page, "/", $lastslash);
>

Yes, as of PHP v5, the following will work:

$string = "abc/def/";
$pos = strrpos($string, "/", -2);
$string = substr($string, 0, $pos);

print $string; // prints abc

In PHP 4.x, only two arguments are accepted.

Read the note on the page that you have mentioned for details.

> And are there class descriptions/header files for php libraries
> so that I can check the syntax.
>

Sure, just download the source code distribution from www.php.net.


JW