Curry for php functions

curry.php

<?php

function curry($func, $params = []){
  return function() use ($func, $params){
    $reflection = new ReflectionFunction($func);
    $neededArgNum = count($reflection->getParameters());
    $args = array_merge($params, func_get_args());
    $argNum = count($args);
    
    if($argNum >= $neededArgNum){
      return call_user_func_array($func, $args);
    }else{
      return curry($func, $args);
    }
  };
};

$add = curry(function($a, $b){
  return $a + $b;
});

$inc = $add(1);

header('Content-Type:text/plain');

echo $inc(12).PHP_EOL; // should be 13
echo $add(20, 30).PHP_EOL; // should be 50
echo $add(4)(7).PHP_EOL; // should be 11

?>