Get prepared for PHP 7
Get prepared for PHP 7
PHP7-improgrammer
PHP7-improgrammer

You probably know -complete beta version of the new PHP 7 is out. The 7.0.0 adaptation contains numerous cool features and functionalities. In any case, we prescribe you to not utilize it underway environment, until you get the steady form, which is on way, November this year.

 

• This is PHP 7

The present stable version is PHP 5.6. In this way, numerous engineers are expecting 6.0 form. What they don’t know is, PHP 6 officially existed in the past as a trial procedure, however never came to the production phase.

• 64-Bit Windows Support

The current PHP doesn’t give 64 bitinteger or large file. The things are going to change later on, as PHP 7 presents steady 64-bit bolster, that implies both native 64-bit integers and large file will be allowed.

• Evacuation of Deprecated Functions and Extensions

One of the fundamental objectives of PHP 7 was to free up the memory to empower change, so it got to be important to remove old unsupported server APIs, extensions and deprecated functionalities. Every single evacuated thing haven’t been utilized for quite a while. Then again, in the event that you have a legacy application running on older editions, moving up to PHP 7 can conceivably break the code.

• Group Use Declarations

This RFC is made to enhance current PHP namespace execution by presenting the idea of group use declaration. This element is valuable for those coders who for the most part import numerous classes from the same namespace. The new structure wipes out verbosity, makes your code tidier and spares you a ton of writing time.

• Anonymous Classes

The idea of these classes is as of now being utilized as a part of other OO programming languages like Java and C#. They are only a class without a name that can accelerate coding and also execution time. You ought to utilize them when a class is utilized just once during execution and when a class is not required to be recorded.

• Uniform Variable Syntax

Uniform variable syntax structure tackles numerous irregularities in how expressions are assessed. For example, the ability to call closure assigned to properties using ($object->closureProperties)(), as well as being able to chain static calls. In seasoned version of PHP, $obj->$properties[‘name’] would get property whose name is in the name key of properties array. Presently, it would get to the name key of the property whose name dwells in $properties.

• Unicode Codepoint Escape Syntax

The new escape character (\u) gives us a chance use Unicode character code (in hexadecimal) unambiguously inside strings. For instance, in the event that you are not able to type any emoji, you can utilize this feature.

• Shared Parent Class in Exception Handling

For PHP coders, taking care of lethal and catchable deadly lapses has never been a simple task. With new Engine Exceptions, you can supplant these sorts of errors with exceptions. To empower coders to get both customary exception and engine exception, PHP 7 introduces a new shared parent class under the name of \BaseException.

• Bind Closure on Call

Closure::bind() and Closure->bindTo() permits you to change the calling of $this and the calling scope, independently or together, creating a duplicate closure. In PHP 7, there is a simple approach to do this at call time, by uing both $this and calling degree to the same article with the expansion of
Closure->call(). The strategy takes the object as its first argument, followed by any argument to pass into the closuretakes the article as its first contention.

• Null Coalesce Operator

Coalesce operator is denoted by “??”. It gives back theresult of its first operand in the event that it exists and is not NULL, else, it will return second operand. That implies it is totally protected to utilize this operator as it won’t raise an E_NOTICE regardless of the possibility that the value does not exist.

• Combined Comparison Operator

This operator (otherwise called spaceship administrator) is like version_compare() or strcmp(), however it can be utilized for generic PHP values. It exists in Ruby and Perl. The administrator returns – 1 if the left operand is more, 0 if both are equivalent and 1 if the left is more.

• Generator Return Expression and Generator Delegation

The generator return expression permits you to give back a value upon finishing a generator. In PHP 7, you can call $generator->getReturn() to retrive value. . If the generator has not yet returned or thrown an uncaught exception, $generator->getReturn() will throw an exception. In case, if generator has completed but there was no return, NULL is returned.
The generator delegation permits you to return another iterable structure that can itself be traversed, whether it’s an iterator, array, or another generator. The substructure is finished by the furthest unique circle, as opposed to a recursive one.

• Return Type Declarations

Many programmers would like to declare the return type of a function. It helps to prevent unintended return values and sub-types from breaking the expected return type of the super-type, especially in interfaces. Moreover, PHP 7 comes with 4 new type decelerations for scalar type – string, int, float and bool. These new types allow coders to specify that they are expecting integer, float, string and boolean to be returned.
• Abstract Syntax Tree

The biggest and most visible change is the expansion of an Abstract syntax tree – an intermediate representation of the code during compilation. It replaces the current routine of emiting opcodes directly from the parser. This permits us to evacuate various hacks and makes the implementation more understandable and maintainable. Likewise, you can execute syntax that was not feasible with single pass compilation process

• The All New Zend Engine

The Zend Engine presented in 1999 in PHP 4. It is an open source scripting engine (written in C) that interprets PHP. The current version uses Zend Engine II, which gives memory and resource administration and includes an extensible object model and adds an extensible object model and significant performance enhancement to the language. The new Zend Engine III, initially codenamed phpng, is being developed for PHP 7.

• Performance + Memory Saving

The most compelling motivation for moving to PHP 7 is its performance. This is uplifting news, particularly for smaller hosts, as they will have the capacity to have more clients on the same hardware. The performance of the 7th version is on par with Facebook HHVM, which features JIT (just-in-time) compiler that allows compilation at run time rather than prior to execution. There is also substantial memory saving, as optimization of internal data structures. PHP 7 is up to twice as fast as PHP 5.6 and Significantly reduced memory usage.