Question

I want to create dynamically an array with N (without knowking N) elements.

Something like a function

public function create_array($num_elements){

     .....
}

that return me something like

//call the function.... 
create_array(3);

//and the output is: 
array{
   0 => null
   1 => null
   2 => null
}

I’ve already thought about array_fill and a simple foreach loop.

Are there any other solutions?

Answer 1

Actually a call to array_fill should be sufficient:

//...
public function create_array($num_elements){
    return array_fill(0, $num_elements, null);
}
//..

var_dump(create_array(3));
/*
array(3) {
  [0]=> NULL
  [1]=> NULL
  [2]=> NULL
}
*/