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HomeBackend DevelopmentPHP TutorialWhat changes have taken place from PHP5.3 to PHP7.1


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 = will always be available regardless of whether the short_open_tag php.ini option is set or not.

  • 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

PHP7.0

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

  • 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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