PHP5.6 and PHP7.0 differences

1. PHP7.0 has a twice-fold performance improvement over PHP5.6.

The 2.php7.0 fully and uniformly supports 64-bit.

The fatal error that occurred before 3.php7.0 was changed to throw an exception.

4. Added the empty UNION operator (?? ）。 The effect is equivalent to the ternary operator.

5.php7.0 adds a new return type declaration for the function.

6.php7.0 added a scalar type declaration.

The formal parameter type declaration of a function in PHP 7 can be a scalar. In PHP 5, only the class name, interface, array, or callable (PHP 5.4, which can be functions, including anonymous functions), can now use string, int, float, and bool.

7. New anonymous classes are added.

PHP 5.3 begins with an anonymous function, and now adds an anonymous class;

8.php7.0 after the overflow removed some old SAPI (server-side application programming ports) and extensions that were no longer supported.

9.define You can now define a constant array.

The difference between the two is only my personal view of the information and documentation after the written, there is a wrong hope that everyone correct, there is a need to learn more about the Official Handbook: http://php.net/manual/en/migration70.new-features.php.

PHP5.6 and PHP7.0 differences