PHP Increment / Decrement Operators

The PHP increment operators are used to increment a variable’s value.

The PHP decrement operators are used to decrement a variable’s value.

Operator    Name              Description
++$x        Pre-increment     Increments $x by one, then returns $x    
$x++        Post-increment    Returns $x, then increments $x by one    
--$x        Pre-decrement     Decrements $x by one, then returns $x    
$x--        Post-decrement    Returns $x, then decrements $x by one