youhackme/PHP7

A Peek at PHP 7 - Helped in the preparation of slides for the presentation at Devcon MRU 2016 by Pierre-Alexandre Clorichel

#A peek at PHP 7

1. Slide 1:

• Release of PHP 7: 3 December 2015
• PHP 7 is now powered by PHPNG (the Next Generation of Zend Engine)

2. Slide 2:

   Why PHP 7?

   One Word: PERFORMANCE

3. Slide 3:

• Insert Images here to show benchmarking results for:

  • Magento

  • WordPress

  • ZF

  • Laravel

4. Slide 4:

Incompatibilities:

• Deletion of deprecated functionalities:

5. Slide 5:

Incompatibilities:

<?php
class ItWasTime{
	public function ItWasTime(){...}
}

new ItWasTime();

6. Slide 6:

Incompatibilities:

7. Slide 7:

Incompatibilities:

• Deletion of ASP and script tags

8. Slide 8:

Incompatibilities:

• Switch case no longer accept multiple defaults. It should contain only one otherwise you will get a Fatal error.

• Causes fatal error: Switch statements may contain one default clause.

9. Slide 9:

Incompatibilities:

An invalid octal now throws a fatal error.

10. Slide 10:

Incompatibilities:

Hexadecimal values are no longer recognized as numeric values.

11. Slide 11:

Incompatibilities:

12. Slide 12:

Incompatibilities:

The two functions func_get_arg and func_get_args returns the value of the variable in their local context.

13. Slide 13:

• Scalar type hinting -- PHP 7 offer you the possibility to type hint with string, integer, float, boolean.

Activate by adding declare(strict_types=1); at the top.

14. Slide 14:

• Possibility to define the type of the returned value. A catchable fatal error is returned if it do not correspond.

15. Slide 15:

Group use declaration

• Commmon namespace declaration can be grouped.

16. Slide 16:

• Anonymous Class
• Same principle as for Anonymous function.

17. Slide 17:

Spaceship Operator

• A new comparison operator (Combined Comparison Operator)

• It is identical to functions strcmp() et version_compare()

• But can compare all types as long as the type on the left is the same as on the right.

• It can compare numbers, strings, arrays, objects, ...

Returns:

• 0 if equal
• -1 if the value on the left is less
• 1 if the value on the right is less

18. Slide 18:

The Null Coalesce Operator

• Returns the result of the left operation if it is not NULL else it returns the results of the right operation.