Fatal error: Cannot redeclare class

[Sanjib Sinha]

I wanted to inherit child classes from parent class. But it gives error like this:

Fatal error: Cannot redeclare class Ch2_Product in C:\wamp\www\OOPhpSolutions\Ch_02\Product.php on line 3

 

I have file like this:

Product.php

<?php

class Ch2_Product

{

protected $_title;

protected $_type;

 

public function __construct($title, $type)

{

$this->_title = $title;

$this->_type = $type;

}

 

public function getTitle()

{

return $this->_title;

}

public function getType()

{

return $this->_type;

}

}

?>

 

Next I've inherited like this:

Book.php

<?php

require 'Product.php';

class Ch2_Book extends Ch2_Product

{

//defining functions

}

 

?>

And DVD.php

<?php

require 'Product.php';

 

class Ch2_DVD extends Ch2_Product

{

//

}

?>

Finally I tried to catch the child class values like this in Ch_Book.php

<?php

require_once 'Book.php';

require_once 'DVD.php';

 

$product1 = new Ch2_Book('Old Man and the Sea', 'Novel');

$product2 = new Ch2_DVD('Gone With the Wind', 'Movie');

echo $product1->getTitle();

echo $product1->getType();

 

echo $product2->getTitle();

echo $product2->getType();

 

?>

 

But it gave that error. Can anyone solve this?

 

[trq]

You are including product.php twice.

[Sanjib Sinha]

I have included Product.php in two separate files, ie;  Book.php and DVD.php. Is it incorrect? But if I did not do this, how would I inherit parent Product class in two separate child class : Book and DVD?

[spiderwell]

use require_once() ?

[Sanjib Sinha]

Yes. You are correct. I just tried require_once in two separate files Book.php and DVD.php and it worked. Many thanks.