Expressions: Arithmetic Operations #

Addition #

Addition can be used to add two values using the + operator, followed by the value to add to the left.

$foo = $bar + $baz;

Subtraction #

Subtraction can be used to subtract two values using the - operator, followed by the value to subtract from the left.

$foo = $bar - $baz;

Multiplication #

Multiplication can be used to multiply two values using the * operator, followed by the value to multiply to the left.

$foo = $bar * $baz;

Division #

Division can be used to divide two values using the / operator, followed by the value to divide from the left.

$foo = $bar / $baz;

Modulus #

Modulus can be used to get the remainder of two values using the % operator, followed by the value to divide from the left.

$foo = $bar % $baz;

Exponentiation #

Exponentiation can be used to exponentiate two values using the ** operator, followed by the value to exponentiate to the left.

$foo = $bar ** $baz;

Unary Plus #

Unary plus can be used to convert a value to a positive number using the + operator.

$foo = +$bar;

Unary Minus #

Unary minus can be used to convert a value to a negative number using the - operator.

$foo = -$bar;

Pre Increment #

Pre increment can be used to increment a value by one using the ++ operator.

$foo = ++$bar;

Post Increment #

Post increment can be used to increment a value by one using the ++ operator.

$foo = $bar++;

Pre Decrement #

Pre decrement can be used to decrement a value by one using the -- operator.

$foo = --$bar;

Post Decrement #

Post decrement can be used to decrement a value by one using the -- operator.

$foo = $bar--;