optimization - optimal way of passing multiple callback functions as arguments? -

i have function used in cli or web application, being said, there little difference in process; example: if i'm using function cli it'll use text progress bar, doesn't make sense if i'm using function web application.

the function loop; i'm looking way make function flexible making possible pass code argument it'll executed @ end of each loop cycle. if i'm using function in cli; i'll pass progress incremental function advance progress bar, , on.

my current solution pass progress bar object instance, think isn't proper solution; because doesn't seem flexible long run.

a demonstration example of i'm doing:

function myfunction($progressbar = null) {     for($i = 0; $i......)     {         //do stuff         ....          //finally...         if(!empty($progressbar))             $progressbar->advance();     } }   

so, if want add function @ end of loop, i'll have pass argument , call manually later; said, doesn't seem right.

i'm thinking of using callback function(an anonymous function being passed myfunction) proper way of doing that; should make each callback function individual argument? or, make more flexible, should grouping callback functions in array(if that's possible).

yes, can use callbacks this.

function myfunction($progressbar = null, callable $callback = null) {     for($i = 0; $i......)     {         //do stuff         ....          //finally...         if(!empty($progressbar))             $progressbar->advance();     }      if ($callback){ //execute callback if passed parameter       $callback();     } }   

also, can specify parameters anonymous function:

example: want echo @ point.

myfunction($progressbar) ; //no need yet myfunction($progressbar, function($result){ echo $result ; }) ; //now want execute 

so, handle in appropriate way:

if ($callback){ //execute callback if passed parameter   $callback("all fine"); //execute callback , pass parameter } 

array of callbacks may useful in case like:

$callbacks = array(   "onstart" => function(){ echo "started" ; },   "onend"   => function(){ echo "ended" ; } ) ;  function myfunc($progressbar = null, $callbacks){   if (isset($callbacks["onstart"]) && is_callable($callbacks["onstart"])){     $callbacks["onstart"]() ;//execute on start.    }    //execute code    if (isset($callbacks["onend"]) && is_callable($callbacks["onend"])){     $callbacks["onend"]() ;//execute on end.    } }