decrement operator in php code example
Example 1: php decrement variable
$var = 1;
// use value (1) THEN decrement by one
$var--;
// decrement by one THEN use value (0)
--$var;
// aside: decrement by custom amount (1 emulates the above)
$var -= 1;
$var -= $step;
Example 2: php decrement variable by 1
$variable--;