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 :(
I was going to say reflection but can't see that working in php 3/4,
likewise with a try catch block to test..
worth noting as well that it appears function_exists itself isn't on
PHP3 (tbh i think you can just not worry about php3.. but you'll know
your specific needs yourself better)
a sure fire approach would be to write all you're own functions and
literally avoid all internal functions :) [you'd sure as hell learn a
lot in the process)
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