PHP 7 New Features

PHP programming language has witnessed the newest revolution in the form of its latest major release that everyone in the programming world is talking about – PHP 7. It offers certain enhanced features over its previous versions in order to improve the way web applications are developed and delivered for use in mobile and cloud platforms.

1.Scalar-type declarations:

The new release is now available in two different types – coercive (default) and strict. They both enable the application of different types of parameters such as strings (string), integers (int), floating-point numbers (float), and booleans (bool).

2.Return type declarations:

They specify the type of value that will be returned from a function and are similar in functioning to argument type declarations.

3.Null coalescing operator:

PHP 7 has added the null coalescing operator (??) as a syntactic sugar to facilitate the common need of using a ternary in combination with isset().

4.Spaceship operator:

This new feature helps compare two expressions in accordance with the standard type comparison rules of PHP.

5.Constant arrays using define()

The Define() feature can now be used to define array contestants. This is an improvement over PHP 5.6 which only allowed defining with const.

6.Anonymous classes:

The new feature introduces support for anonymous classes through new class which can be used instead of full class definitions for throwaway objects.

7.Unicode codepoint escape syntax:

With this feature, a Unicode codepoint is taken in hexadecimal form and produced in UTF-8 to a double-quoted string or heredoc.

8.Closure::call():

A shortcut method of binding an object scope to a closure temporarily and invoking it.

9.Filtered unserialize():

Improved security while unserializing objects on untrusted data.

10.IntlChar:

Intends to highlight additional ICU functionality – several static methods and constants in use to manipulate unicode characters.

11.Expectations:

An improvement to the older assert() function, this new feature enables cost-free assertions in production code and throwing custom exceptions in case of assertion failure.

12.Group use declarations:

It facilitates grouping of classes, functions and constants imported from the same namespace in a single use statement.

13.Generator Return Expressions:

An improvement over the generator functionality introduced in the earlier version, it allows a return statement to be used within a generator to permit return of a final expression.

14.Generator delegation:

Automatic delegation from generator to generator, traversable object, or array, without the need to write boilerplate in the outermost generator by using the yield from construct.

15.Integer division with intdiv():

Performs an integer division of its operands and returns it.

16.Session options:

It enables acceptance of an array of options that dominate the session configuration directives usually set in php.ini.

17.preg_replace_callback_array():

This new function would enable cleaner written code while using the preg_replace_callback() function.

18.CSPRNG Functions:

Two new features – random_bytes() and random_int() – have been added in PHP 7 to generate cryptographically secure integers and strings in a cross-platform manner.

PHP 7 has been designed to offer superfast code updates in line with today’s IT work demands.

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