Matt Pagel wrote:
> Is there a way to check not only if a function exists, but also to check
> that the number and types of parameters desired match a function
> definition?
>
> The reason being that additional options have been added in php 4 and 5
> to various standard function calls, but I'm still running a php3 and
> php4 server in addition to a php5 server. I would like to make sure
> that certain "extended" function calls still work in all versions (or
> I'll perform the tasks "manually", albeit less efficiently).
>
> One example I can think of is the round() function. The $precision
> parameter was added in php4, so will not work in php3. However,
> function_exists would return TRUE for both 3 and 4, but round itself
> would fail if I tried to send a precision level to the php3 server.
>
> Thanks much,
> Matt
>
> P.S. Of course the modified "function_exists" would unfortunately have
> to be a recognized function/method in php3 in order for me to call it to
> check parameter counts on a php3 server :(
Unless I misunderstand you, why not just execute based upon the version
or some similar approach? Actually, I can't even find any version 3
docs, so maybe I should bow out?
// Only needed if PHP_VERSION is not included in version 3, I dunno
if (!defined('PHP_VERSION')) { define('PHP_VERSION', '3'); }
if (PHP_VERSION < 4) {
$num = round(101.11);
} else {
$num = round(101.11, 0);
}
As I type this I think: if you're going to use the script on v3, 4 and
5, then why would you use the second parameter? You'll get a whole
number returned on v3 so why would you want a fractional returned on
other versions?
--
Thanks!
-Shawn
http://www.spidean.com
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