how to create new class variables in php code example

Example 1: php define class

class Bike {
    	function Bike() {
            $this->type = 'BMX';
    }
}

$blackSheep = new Bike();

print $blackSheep->type;

Example 2: declare variable in php class

<?php
class SimpleClass
{
   public $var1 = 'hello';
}
?>