Fatal error: Declaration of .. must be compatible with .. PHP

by

Ishoppingcart::addToCart() states that the method does not take any parameter, while the implementation Shoppingcart::addToCart(Product $product) requires that a parameter of type Product must be passed into the method. This means that both declarations are incompatible and while the implemented interface must be satisfied PHP throws the shown error.

Solution would be to either change Ishoppingcart::addToCart() to Ishoppingcart::addToCart(Product $product) so that it requires a parameter of type Product or to change Shoppingcart::addToCart(Product $product) to allow no parameter to passed into the method: Shoppingcart::addToCart(Product $product = null);

The correct way depends on your application requirements.

More Related Contents:

  1. How do I catch a PHP fatal (`E_ERROR`) error?
  2. PHP Fatal error: Using $this when not in object context
  3. PHP : Custom error handler – handling parse & fatal errors
  4. Weird PHP error: ‘Can’t use function return value in write context’
  5. PHP Fatal error: Cannot redeclare class
  6. Fatal error: Class ‘SoapClient’ not found
  7. How to catch the fatal error: Maximum execution time of 30 seconds exceeded in PHP
  8. Fatal error: Using $this when not in object context
  9. Handle fatal errors in PHP using register_shutdown_function()
  10. relative path in require_once doesn’t work
  11. Why, Fatal error: Class ‘PHPUnit_Framework_TestCase’ not found in …?
  12. PHP Fatal error: Cannot access empty property
  13. How can I catch a “catchable fatal error” on PHP type hinting?
  14. WordPress Fatal error: Uncaught Error: Call to undefined function mysql_connect() in /wp-includes/wp-db.php:1570
  15. Cannot redeclare function php [duplicate]
  16. Fatal error: Call to undefined method mysqli_stmt::get_result()
  17. Fatal error: Allowed memory size of 268435456 bytes exhausted (tried to allocate 71 bytes)
  18. set_error_handler() doesn’t work for FATAL error
  19. How do i edit home page of magento
  20. PDO get the last ID inserted
  21. Accessing $_COOKIE immediately after setcookie()
  22. How to echo or print an array in PHP?
  23. How can I convert ereg expressions to preg in PHP?
  24. How can I find the first and last date in a month using PHP?
  25. Is GOTO in PHP evil? [closed]
  26. php include prints 1
  27. Get the price of an item on Steam Community Market with PHP and Regex
  28. PHP try-catch blocks: are they able to catch invalid arg types?
  29. simplexml error handling php
  30. Large hex values with PHP hexdec

Leave a Comment