Tutorial 3: Using Class Visibility operators

<?php

class cd{

public $artist;

public $title;

protected $tracks;

private $_diskId; // regularily private varible will be star

}

//Instantiate an object of class'cd'.

$mydisk=new cd();

//Now update the artist's name.

$mydisk->artist='Justic fever';

// baby,baby,baby,hoo... baby,baby,baby,hoo.... XD

//Now try to update the protected or private values

//This will cause a fatal error.

$mydisk->tracks="Boy Friend";

?>

Output:

Fatal error: Cannot access protected property cd::$tracks

Point:it is because track was declared with protected,therefore , you cannnot access it.

a Tips for Justice fever 's fans: if declare with public,you may solve the error then. (just teasing ,no offensive)

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