New in php 5.6

PHP 5.6 have lots of new improvements but also marked some functions as deprecated ,Let's discuss below Backward Incompatible .

Backward Incompatible

json_decode

json_decode() function now removes all non-lowercase variants of json literals ex: true, false, and null.

GMP Resources

If you are checking resource explicit using is_resource() then you have to modify your otherwise no need to modify anything.

Mcrypt

Some Mcrypt function like mcrypt_encrypt(), mcrypt_decrypt(), mcrypt_cbc(), mcrypt_cfb(), mcrypt_ecb(), mcrypt_generic(), and mcrypt_ofb() now will not accept keys if size is incorrect .

Array Values and Overwriting

Previously in it'sversion array value use to overwritten when the explicit key was the same as sequential implicit key. let's consider below example

 

What's new in PHP 5.6

Constant Scalar Expressions

Now it's possible to have scalar expression that holds both numeric and string literals.

Argument Unpacking

get arguments of array or a set of Traversable objects.

** shorthand

now it's easy in 5.5 to declare exponentiation as shorthand ,let's check below

phpdbg

User interactive debugger included in PHP5.6 .for details of phpdbg check official documentation .

Default Character Encoding

Using this function default_charset() ,we can now define default chracter of these functions htmlentities(), html_entity_decode() and htmlspecialchars().

Large File Upload

Now it is possible to uploaded larger file than 2 GB .