Triple Plus Operator
<?php
$a = 1;
$b = $a+++ ++$a;
echo $b;
This is a white space trick, where the expression allows for ++ and + to follow each other. Note that it is not possible to make a quadruple (four times) or pentuple (five times), operator, as PHP does not parse it anymore.
See Also
PHP Features
Last updated: 10 September 2026