PHP variable function

Question

Let's pretend this is happening inside of a class method (pure example):

public function runEvent($funcName, $params)
{
 $funcName($this, $params);
}

//somewhere else
function myFunc($anBOject, $paramsHere, $somethingElse = NULL)
{
 //do stuff
}

$SomeClassObj->runEvent('myFunc', array('dog', 'cat'));

Can I assume PHP will execute myFunc with the first parameter being $this, second being $params, and then NULL as the 3rd param (by default)?

This question is more just for understanding how PHP deals with variable functions. Im not actually having any issues in a certain project.

Thanks!

"Can I assume" -- can you just check it yourself? It would take couple of minutes — zerkms
– zerkms, Commented Mar 18, 2012 at 22:33
Thought it would also be a good reference for anyone in the future who was thinking the same thing. — Kovo
– Kovo, Commented Mar 18, 2012 at 22:34
if checking yourself takes less than asking a question - there is no reason to bother yourself and community, imho — zerkms
– zerkms, Commented Mar 18, 2012 at 22:40
you should also make sure you check the function exists before calling it and protect the script from injected code else you could have problems later on... — Lawrence Cherone
– Lawrence Cherone, Commented Mar 18, 2012 at 22:49
@MikeB it seems that there is already almost every PHP manual page here at SO.... no need to duplicate, solution is to query the database. — Sampo Sarrala
– Sampo Sarrala, Commented Oct 12, 2012 at 20:26

deceze · Accepted Answer · 2012-03-18 22:39:04Z

1

Yes.

$funcName($this, $params);

is called exactly the same way as

myFunc($this, $params);

The first parameter is $this, the second $params, there's no third.

To call functions with a variable number of arguments, use call_user_func_array.

answered Mar 18, 2012 at 22:39

deceze♦

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2 Comments

Kovo Over a year ago

@zerkms figured it out before, and now future devs will be able to reference this post. Goal accomplished.

zerkms Over a year ago

@Kovo: there are already a bunch of similar questions here. Goal has been accomplished long ago stackoverflow.com/questions/7213825/…

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