The var keyword in PHP is used to declare a property or variable of class which is public by default. The var keyword is same as public when declaring variables or property of a class.
Note: The var keyword was deprecated from version 5.0.0 up to version 5.1.2. Since PHP 5.1.3 it has been added again.
Syntax:
class className {
var $variable = "neveropen";
// Other statements
}
Below programs illustrate the var keyword in PHP:
Program 1: This program illustrates the var keyword.
php
<?php// Declaring a classclass Geeks { // Using var keyword // to declare Public variable var $var1 = 'Public'; // Declaring protected variable protected $var2 = 'Protected'; // Declaring private variable private $var3 = 'Private';}// Creating an object$obj = new Geeks();// Calling var declared variableecho $obj->var1 . "\n";;?> |
Output:
Public
Program 2: This program illustrates the var and public keyword.
php
<?php// Declaring a classclass Geeks { // Using var keyword // to declare Public variable var $var1 = 'Var Public'; // Using public keyword // to declare Public variable public $var2 = 'Public';}// Creating an object$obj = new Geeks();// Calling var declared variableecho $obj->var1 . "\n";// Calling public declared variableecho $obj->var2 . "\n";;?> |
Output:
Var Public Public
Program 3: This program demonstrating the error while calling private variables.
php
<?php// Declaring a classclass Geeks{ // Using var keyword // to declare Public variable var $var1 = 'Var Public'; // Using private keyword // to declare private variable private $var2 = 'Private';}// Creating an object$obj = new Geeks();// Calling var declared variableecho $obj->var1 . "\n";;// Calling private declared variable// It will give errorecho $obj->var2 . "\n";;?> |
Output:
Var Public
Error:
PHP Fatal error: Uncaught Error: Cannot access private property
Geeks::$var2 in /home/46488c166fd1197d687867f62e03b8b8.php:24
Stack trace:
#0 {main}
thrown in /home/46488c166fd1197d687867f62e03b8b8.php on line 24
