Abstract: This article comes from the official PHP documentation. It will not be expanded here. It is given to interested friends as a research list. PHP 5.3 https://secure.php.net/manual... Added namespace support. Added static late binding support. Added jump tag support. Added native closure (Lambda/anonymous function) support. ...

This article comes from the official PHP documentation. It will not be expanded here. It is given to interested friends as a research list.

PHP 5.3

https://secure.php.net/manual...

• Added namespace support.

• Added static late binding support.

• Added jump tag support.

• Added native Closure (Lambda/anonymous function) support.

• Added two new magic methods, __callStatic and __invoke.

• Added Nowdoc syntax support, similar to Heredoc syntax, but including single quotes.

• It becomes possible to initialize static variables and class properties/constants using Heredoc.

• Double quotes can be used to declare Heredoc, which supplements the Nowdoc syntax.

• The const keyword can be used outside the class to declare constants.

• The ternary operator has a short form: ?:.

• The HTTP stream wrapper will treat all status codes from 200 to 399 as success.

• Dynamic access to static methods becomes possible.

• Exceptions can be embedded.

• A garbage collector for circular references has been added and is enabled by default.

• mail() now supports email sending logs. (Note: Only emails sent through this function are supported.)

PHP 5.4

https://secure.php.net/manual...

• Added support for traits.

• New short array syntax, such as $a = [1, 2, 3, 4]; or $a = ['one' => 1, 'two' => ; 2, 'three' => 3, 'four' => 4]; .

• Added support for member access analysis of arrays returned by functions, such as foo()[0].

• Now closures support $this .

• Now

• Added access to class members during instantiation, for example: (new Foo)->bar() .

• Class::{expr}() syntax is now supported.

• Add binary direct value, for example: 0b001001101.

• Improved parsing error messages and warnings for incompatible parameters.

• SESSION extension now tracks file upload progress.

• Built-in CLI mode web server for development.

PHP5.5

https://secure.php.net/manual...

• New Generators

• New finally keyword

• foreach now supports list()

• empty() supports any expression Formula

• array and string literal dereferencing ¶

• New password hashing API

• Improvements GD

PHP5.6

https://secure.php.net/manual...

• Use expressions to define constants

• Use... operators to define variable-length parameter functions

• Use ... operator for parameter expansion

• Use ** for exponentiation

• use function and use const

• phpdbg

• Default character encoding

• php://input is reusable

• Large file upload (can now support file uploads larger than 2GB)

• GMP supports operator overloading

• Use hash_equals() Compare strings to avoid timing attacks

• __debugInfo()

• ##gost-crypto hashing algorithm

• SSL/TLS improvement

• pgsql asynchronous support

• Scalar type declaration

• Return value type declaration

• null merge Operator

• Spaceship operator (combination comparison operator)

• Define constant array through define()

• Anonymous class

• Unicode codepoint translation syntax

##Closure::call()

• Provide filtering for unserialize()

• IntlChar

• Expected

• Group use declarations

• Generators can return expressions

• Generator delegation

• Integer division function intp()

• Session options

• preg_replace_callback_array()

• CSPRNG Functions

• You can use the list() function to expand objects that implement the ArrayAccess interface

• Other features

PHP7.1

https://secure.php.net/manual...

• Nullable type

• Void function

• Symmetric array destructuring

• Class constant visibility

• iterable pseudo-class

• Multiple exception capture processing

• list() now supports key names

• Support negative string offset

• ext/openssl Support AEAD

• Convert callables to closed through Closure::fromCallable() Package

• Asynchronous signal processing

• HTTP/2 server push support in ext/curl

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