PHP video tutorial 36 – PHP Special Operators in PHP



PHP video tutorial 36 – PHP Special Operators in PHP
( new , instanceof, member access & scope resolution operators)

PHP Special Operators

new operator:
– is used to create new instance of a class
Syntax:
$variableName = new ClassName();

instanceof operator:
– is used to test whether a variable is pointing to an instance of a specific class
Syntax:
$variableName instanceof ClassName

member access operator (->):
– is used to access members of an object
Syntax:
$variableName->memberName

scope resolution operator(::):
– is used to access static, constant & overridden members of a class
Syntax:
$variableName::memberName
OR
ClassName::memberName

Example Code:
class Circle
{
var $radius = 10;
const PI=3.142;
}
$circle1 = new Circle();
echo $circle1 instanceof Circle ? “true” : “false”; // true
echo “<br/>”;
echo $circle1->radius; // 10
echo “<br/>”;
echo Circle::PI; // or $circle1::PI; // 3.142
echo “<br/>”;

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Follow the link for next video:
PHP video tutorial 37 – Precedence & Associativity of operators in PHP

Follow the link for previous video:
PHP video tutorial 35 – PHP String Operators in PHP

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