boolean toggle

While exploring Tumblr, I saw the following post:

ec1975:

…when switching don’t mind using:

if ($val==0) $val = $1; else $val = 0;

instead use:

$val = abs ($val-1);

It’s ok (except the $1 typo); but the following solution is far more efficient:

$val ^= 1;

I saw the post and wanted to leave a comment; but I couldn’t. That’s why I’m posting this. :)