Is there a PHP function for swapping the values of two variables?

Question

Say for instance I have ...

$var1 = \"ABC\"
$var2 = 123

and under certain conditions I want to sw

Answer 1

It is also possible to use the old XOR trick ( However it works only correctly for integers, and it doesn't make code easier to read.. )

$a ^= $b ^= $a ^= $b;