PHP: call dynamic function, but in a class?

Question

I am trying to create an initialisation function that will call multiple functions in the class, a quick example of the end result is this:

$foo = new bar;
$foo->call('funca, do_taxes, initb');

This will work fine normally with call_user_func function, but what I really want to do is do that inside the class, I haven't a clue how to do this, a quick example of my unworking code is as follows:

class bar {
   public function call($funcs) {
       $funcarray = explode(', ', $funcs);
       foreach($funcarray as $func) {
          call_user_func("$this->$func"); //???
       }
   }
   private function do_taxes() {
       //...
   }
}

How would I call a dynamic class function?

Mark Elliot · Accepted Answer · 2011-01-11 04:36:22Z

7

You need to use an array, like Example #4 in the manual:

call_user_func(array($this, $func));

answered Jan 11, 2011 at 4:36

Mark Elliot

77.4k23 gold badges147 silver badges162 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

mfonda Over a year ago

+1. I tend to prefer call_user_func() or call_user_func_array() over $this->$func().

Amber · Accepted Answer · 2011-01-11 04:36:37Z

5

It's actually a lot simpler than you think, since PHP allows things like variable variables (and also variable object member names):

foreach($funcarray as $func) {
    $this->$func();
}

answered Jan 11, 2011 at 4:36

Amber

531k89 gold badges643 silver badges558 bronze badges

1 Comment

Tim N. Over a year ago

Thank you Amber, I am glad I could connect to two and finish my script now.

jon_darkstar · Accepted Answer · 2011-01-11 05:03:21Z

0

All you need to do is

$this->$func();

EDIT - disregard last post, i was a little hasty and misunderstood

You can do something similar in place of call_user_func either for native or user functions

function arf($a) {print("arf $a arf");}

$x = 'strlen';
$f2 = 'arf';

print($x('four')."\n");
$f2($arg1);

OUT

4
arf  arf

edited Jan 11, 2011 at 5:03

answered Jan 11, 2011 at 4:35

jon_darkstar

16.9k7 gold badges35 silver badges38 bronze badges

Comments

Stephen · Accepted Answer · 2013-02-10 03:18:55Z

0

when we want to check whether a class function/method exists within the class,

then this could help

inside class...

 $class_func = "foo";

 if(method_exists($this , $class_func ) ){
    $this->$class_func();
  }

 public function foo(){
   echo " i am called ";
 }

edited Feb 10, 2013 at 3:18

answered Feb 9, 2013 at 14:59

Stephen

3,4754 gold badges24 silver badges31 bronze badges

Collectives™ on Stack Overflow

PHP: call dynamic function, but in a class?

4 Answers 4

1 Comment

1 Comment

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

4 Answers 4

1 Comment

1 Comment

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related