Replacing two Variables with each other's Value

Asked Mar 30 '18 at 17:35

Active Mar 30 '18 at 17:51

Viewed 376 times

In this code

$x = 1;
$y = 2;
echo $x.$y; //12

I want to replace $x and $y vlaues with each other, So $x = 2 and $y = 1, Is that possible to be achieved without assigning middle-variables? Something like using a ready-function or like

$x = 1;
$y = 2;
echo $x.$y; //12
$x = &$y;
$y = &$x;
echo  $x.$y //22

But instead of 22 I want to get 21.

asked Mar 30 '18 at 17:35

Toleo

1

Are the variables necessarily integers? – Tripp Kinetics Mar 30 '18 at 17:37
@TrippKinetics nope, can be strings. – Toleo Mar 30 '18 at 17:37
4

`list($x, $y) = [$y, $x];` – u_mulder Mar 30 '18 at 17:38
Isn't that still using scratch space? – Tripp Kinetics Mar 30 '18 at 17:39
You can do for Integer type of variables without temp variable. For string, I think you have to use temp variable. – Naveed Ramzan Mar 30 '18 at 17:39
1

What @u_mulder said is correct. But it will still use swap space behind the scenes. That’s unavoidable in PHP. – elixenide Mar 30 '18 at 17:40
2

duplicate of [This Question](https://stackoverflow.com/questions/18356437/swap-two-variables-value-without-using-third-variable-in-php) – Uzair Mar 30 '18 at 17:42

Replacing two Variables with each other's Value

0 Answers0