call_user_func

Anon

As of 4.0.6 or something, call_user_func changed. Before I could reference things, ie:

call_user_func("foo", &$var1);

and:

function foo(&$var1) { ... }

However now I get a nasty error:

Warning: Call-time pass-by-reference has been deprecated - argument passed by value; If you would like to pass it by reference, modify the declaration of call_user_func(). If you would like to enable call-time pass-by-reference, you can set allow_call_time_pass_reference to true in your INI file. However, future versions may not support this any longer.

Help? 🙂 Thanks.

factory21

instead of using call_user_func, just call the function outright:

foo($var1);

instead of:

call_user_func(\"foo\",&$var);

Anon

Can't do that either.

The way my script is set up, it does not know the names of the functions. It is given an array of data, certain indexes dictate what functions should be called. Ex:

array(
'name' => 'Bobbb',
'function' => 'BobsCustomFunction'
);

etc. The point is so I don't have to recode the portion of code that calls the function every time i add a new function that must be called in this series...

mithril

The warning mesage (it's not an error) has nothing to do with call_user_func. As it says in the warning, passing by reference at call-time (ie. call_user_func("foo", &$var1)😉 is deprecated and is thus due to be removed from the language at some (yet to be determined) point in the future. It's the "&$var1" bit in the call_user_func line that's giving you the problems.

I'm not sure why you'd want to pass as your code snipet indicates anyways. Function foo() already accepts $var1 by reference. By passing foo() $var1 by reference at call-time you're actually passing a reference of a reference. This gives you absolutely no advantage and just adds a (small) bit of overhead in terms of memory and clock-cycles.

The syntax you used in the foo() declaration is the prefered method of reference passing and has not been deprecated. Functions can still accept arguments by reference. This is naturally better since once you've declared the function that way, the arg will be a reference everytime.... whether to remember to pass a reference or not.

-geoff