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Arithmetic Operators

Remember basic arithmetic from school? These work just like those.

Table 14-2. Arithmetic Operators

Example	Name	Result
-$a	Negation	Opposite of $a.
$a + $b	Addition	Sum of $a and $b.
$a - $b	Subtraction	Difference of $a and $b.
$a * $b	Multiplication	Product of $a and $b.
$a / $b	Division	Quotient of $a and $b.
$a % $b	Modulus	Remainder of $a divided by $b.

The division operator ("/") returns a float value anytime, even if the two operands are integers (or strings that get converted to integers).

See also the manual page on Math functions.

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nbsp;print "MyClass::printHello() " . $this->private;
      print "MyClass::printHello() " . $this->protected;
      print "MyClass::printHello() " . $this->protected2;
   }
}

class MyClass2 extends MyClass {
   protected $protected = "MyClass2::protected!\n";

   function printHello() {

      MyClass::printHello();

      print "MyClass2::printHello() " . $this->public;
      print "MyClass2::printHello() " . $this->protected;
      print "MyClass2::printHello() " . $this->protected2;

      /* Will result in a Fatal Error: */
      //print "MyClass2::printHello() " . $this->private; /* Fatal Error */

   }
}

$obj = new MyClass();

print "Main:: " . $obj->public;
//print $obj->private; /* Fatal Error */
//print $obj->protected;  /* Fatal Error */
//print $obj->protected2;  /* Fatal Error */

$obj->printHello(); /* Should print */

$obj2 = new MyClass2();
print "Main:: " . $obj2->private; /* Undefined */

//print $obj2->protected;   /* Fatal Error */
//print $obj2->protected2;  /* Fatal Error */

$obj2->printHello();
?>