PHP Variables variable:

Variables variable is a new kind of technique of using variables, in this technique we need to use more than one variable and we can use those variables dynamically.

As in the following examples we can see the use of variable variable both in general use as well as in OOP concept.

PHP Variables Variable Example:

<?php

$a="Rose";

$$a="India";

echo "$a ${$a}";

Output:

Rose India

Example:

<?php

class foo

var $is="This is inside the class";

$is="variable";

$o=new foo;

$m="my variable";

echo $o->is."<br/>";

$bas=array('this','is','outside');

echo $o->$bas[1]."<br/>";

$o->m;

Output:

This is inside the class
This is inside the class

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