Basic Object Oriented script does not work

[DimitriDV]

Hi there, I am starting to learn OO PHP programming. After running math.php, it gives an output 'Use only numbers'.

Why? I don't understand this.

 

math.php

<?php
require('MathClass.php');
$c = new MathClass();
echo $c->add(5,10,15,20);
     
?>

 

MathClass.php

<?php

class MathClass{

function add(){
	$args = func_num_args();
	$sum = 0;
	$i = 0;

	for ($i ; $i < $args ; $i++){
		is_int(func_get_args($i)) ? $sum += func_get_args($i) : die('Use only numbers');
	}
	return $sum;
}
}
?>

[trq]

func_get_args() returns an array.

[DimitriDV]

What is the solution? 

[BlueSkyIS]

because func_get_args($i) is not an integer.

 

is_int(func_get_args($i)) ? $sum += func_get_args($i) : die('Use only numbers');

[l4nc3r]

You're putting func_get_args into an is_int function to check if it's an int.  But it'll never be of type int because, like thorpe said, func_get_args returns an array.

[ignace]

class Math
{
    public function add() {
        return array_sum(array_filter(array_map('is_int', func_get_args())));
    }
}

 

(intval() would have worked too)

 

$math = new Math();
echo $math->add(1,2,3,4,5,'hello','world'); // Output: 15

 

Don't you just love PHP?

[DimitriDV]

Fatal error: func_get_args(): Can't be used as a function parameter in MathClass.php on line 6

[ignace]

class Math
{
    public function add() {
        return array_sum(array_filter(array_map('intval', $a=func_get_args())));
    }
}

[DimitriDV]

Sorry, I am still receiving the same error 

[suma237]

class MathClass{
function add(){
$numargs = func_num_args();
$args = func_get_args();
//echo  $args;
$sum = 0;$i = 0;
for ($i ; $i < $numargs ; $i++){

if(is_integer($i)) $sum += $args[$i];
//is_int(func_get_args($i)) ? $sum += func_get_args($i) : die('Use only numbers');

}
return $sum;
}
}

[DimitriDV]

Thanks!