Operators

$x     = 2 ;
$cost  = 29.95 ;
$name  = 'Harvey' ;
$y     = $x ;

$x     = 2 + 2 ;
$y     = $x + $z ;
$fruit = $apples + $oranges ;

$y     = 29 - 17 ;
$x     = $y - $x ;
$z     = $z - 1 ;

$gross    = 12 * 12 ;
$twogross = $gross * 2 ;

$z     = 12 / 4 ;
$x     = 14 / 3 ;

$x     = 14 % 3 ;
$y     = $x % 2 ;

$x++ ; // post-increment
++$x ; // pre-increment
$y-- ; // post-decrement
--$y ; // pre-decrement

$y = 5 ;
$x = $y++ ; // $x equals 5, $y equals 6

$y = 5 ;
$x = ++$y ; // $x and $y both equal 6

$x = 'y' ;
$x++ ; // now $x is 'z'
$x++ ; // now $x is 'aa'

$x = 'spaz' ;
$x++ ; // now $x is 'spba'

$x = 'K9' ;
$x++ ; // now $x is 'L0' ;