PHP 7 is the latest version of PHP.It was released on 3-Dec-2015.PHP 7 offers fast performance for online applications and websites. PHP 7 contains so many cool features that are give below.
Some most significant feature of PHP 7 are given below.
Speed: PHP 7 is twice as fast as PHP 5.
Scalar type declarations: Now we can specify the type (int,float,array,etc) of variable that a function should return and parameters of functions.
Lower Memory Usage: Now we can specify the type (int,float,array,etc) of variable that a function should return and parameters of functions.
Improved Exception hierarchy: Exception hierarchy has been improved in PHP 7.
Anonymous Classes: Support for Anonymous Classes has been added in PHP 7 .
New operators : The null coalescing operator (??) is added..
The foundation of PHP 7 is a PHP branch that was originally dubbed PHP next generation (phpng). It was authored by Dmitry Stogov, Xinchen Hui and Nikita Popov.PHP 7 uses Zend Engine 3.0.
Spaceship Operator has been introduced in PHP 7.It returns -1, 0 or 1 when varible $a is respectively less than, equal to, or greater than varible $b.
Anonymous Classes is added in PHP 7.Anonymous classes are defined without any name.we can define an anonymous class using keyword "new class".