Dynamic php function

Question

How can we declare the function name dynamically?

For example :

$function = 'test'
public $function(){

}

Why should you be interested in the _name_ of a dynamic function? That makes no sense, since you never call it my its name. The example you give does _not_ attempt to define a dynamic function at all, but an ordinary global function. — arkascha, Jan 17 '17 at 12:05
@SougataBose For that you want to store a dynamic function ("lambda function") inside a variable. That does not change the _name_ of a function, but only it's scope. — arkascha, Jan 17 '17 at 12:13
i am interested to dynamic function , because i have to generate relation functions in yii2 model , these functoins change whene the model change . So it should be dynamic. Please read my post here : http://stackoverflow.com/questions/41693837/advanced-yii2-application-function-to-generate-relation-model-dynamically-with — soussou, Jan 17 '17 at 12:14
@arkascha, I meant - `function a() {echo 'hi';}; $a = 'a'; $a();` — Sougata Bose, Jan 17 '17 at 12:16
@SougataBose Sure, I understood that. But still that does _not_ change the functions name as the OP asks. — arkascha, Jan 17 '17 at 12:19
Yes that does not. I am just sure why OP want to do that. I was just wandering. :) — Sougata Bose, Jan 17 '17 at 12:21

score 0 · Answer 1 · edited May 23 '17 at 12:10

0

You could use a callback for this:

https://stackoverflow.com/a/2523807/3887342

function doIt($callback) { $callback(); }

doIt(function() {
    // this will be done
});

edited May 23 '17 at 12:10

Community

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answered Jan 17 '17 at 12:10

PaladiN

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And what is the purpose of this syntax artistic? Why not simply do what will be done? – arkascha Jan 17 '17 at 12:12

score 0 · Answer 2 · answered Jan 17 '17 at 13:06

Declaring a function with a variable but arbitrary name like this is not possible without getting your hands dirty with eval() or include().

I think based on what you're trying to do, you'll want to store an anonymous function in that variable instead (use create_function() if you're not on PHP 5.3+):

$variableA = function() {
    // Do stuff
};

You can still call it as you would any variable function, like so:

$variableA();

Dynamic php function

2 Answers2