How to dynamically call functions with x amount of parameters.

arrayOfFunctions.php

<?php

  $results = array();

  # The "$selected_functions" array will be constructed on the client side and posted to the PHP controller function.
  # Populate the "$selected_functions" array based on user interaction with the UI.

  $selected_functions = array(
    "function_1" => array("parameter_1_1", "parameter_1_2", "parameter_1_3"),
    "function_2" => array("parameter_2_1"),
    "function_3" => array("parameter_3_1", "parameter_3_2")
  );
  
  # The "$array_of_functions" array contains all function defintitions.

  $array_of_functions = array(
    "function_1" => function($parameter_array_1) {
      # Amazing code
      return $result;
    },
    "function_2" => function($parameter_array_2) {
      # Amazing code
      return $result;
    },
    "function_3" => function($parameter_array_3) {
      # Amazing code
      return $result;
    }
  );

  # We loop through the "$selected_functions" array to determine which functions must be invoked.
  # Use "$key" to refer to the function name and "$value" to refer to the array of parameters.
  # "$key" is used to select the "assocative index" from "$array_of_functions".
  # "$parameters" is simply passed as a paramter.

  # With default naming: foreach($array as $key => $value)
  foreach($selected_functions as $function => $parameters)
  {
     $results[$function] = $array_of_functions[$function]($parameters);
  }

  # Process "$results"