Increment

Increment generally refers to the process of increasing or adding a small amount to a value, or simply one unit.

In PHP, increments usually refer to the pre-plusplus and post-plusplus.

<?php

$a = 1;

echo ++$a; // pre plus plus : displays 1, and $a ends with 2

echo $a++; // post plus plus

echo $a += 1; // increment

?>