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15. PHP 7.1 introduce Void Return Types. Basically PHP did not required return statement in function defenition. By using void return type makes it clearer that function's purposed to perform an action, rather than producing a result #MigrateToPHP7

14. PHP 7.1 introduced Nullable Types. This was purposed to indicate a value can be null. It can be used in function param and function return. By use it, that type could be null and mandatory at the same type. It works both with Scalar Types and Compound Types #MigrateToPHP7

13. PHP 7.1 introduced Iterable Pseudo-Type. This will be used as a type declaration on a parameter or return type to indicate the value is iterable. This type accepts any array, any object implementing Traversable and Generator #MigrateToPHP7

12. Class Constant Visibility was public by default. PHP 7.1 introduced Class Constant Visibility (public, protected and private) declaration. But we can keep declare constant without any explicit visibility, similar to old behavior.And default visibility is public #MigrateToPHP7

11. PHP 7.1 introduced Multiple Exception Types handling. This feature is needed when want to make same treatment for different Exception Types #MigrateToPHP7

10. PHP 5.3 release introduced namespace. And this made we have numerous use statements used to import classes from various namespaces. PHP 7 introduced goup use declarations #MigrateToPHP7

09. PHP 7 improved the Error Handling system by introducing Throwable interface, and moving the errors and exceptions under it. While \Exception is the base class for all PHP and user exceptions, \Error is the base class for all internal PHP errors. #MigrateToPHP7

8. PHP has two types of constants. The Constants and Class Constants. PHP 5.6 allowing Class Constants with Array Type. And in PHP 7 The Constants with Array Type added. #MigrateToPHP7

7. PHP 7 introduced spaceship <=> operator. It offers combined comparison. After comparison, it follows these conditions: 1. It returns 0 if both operands are equal 2. It returns 1 if the left operand is greater 3. It returns -1 if the right operand is greater #MigrateToPHP7

6. PHP 7 introduced null coalesce ( ?? ) operator. It helps us to write shorter expressions. It returns the result of its first operand if it exists and is not null, or else its second operand. #MigrateToPHP7

5. PHP 5.5 has introducing Generator, but it lacked return expressions. And in PHP 7, support for return expressions added. We need to iterate over the generator, and once it's done, we can call the getReturn() method to retrieve the return value #MigrateToPHP7

3. PHP 7 support Anonymous Classes. Because sometimes there are cases where classes are only used during execution. These rare cases make it verbose to force a class definition separately when we know that the class is only being used once #MigrateToPHP7

2. In PHP 7 Type Hinting not just on function paramteter only, but it also can be apply to function return values. PHP will match the hinted return type, otherwise \TypeError Exception will be thrown #MigrateToPHP7

1. PHP Support Type Hinting in PHP5. But that was just for Object. And Array in PHP 5.1 In PHP 7 Scalar Type (int, float, string, bool) can be Type Hinted too. With strict types directive turned on, it will give \TypeError Exception when passing improper data type #MigrateToPHP7

Continue... #MigrateToPHP7 New features we can use in PHP 7 09. Throwables 10. Group use declaration 11. Catching Multiple Exceptions Types 13. Class Constant Visibility Modifiers 13. Iterable Pseudo-Type 14. Nullable Types 15. Void Return Types

Here are some of new features which we can use in PHP 7.1 1. Scalar Type Hints 2. Return Type Hints 3. Anonymous Classess 4. Generator Delegation 5. Generator Return Expressions 6. Null Coalesce operator 7. Spaceship Operator 8. Constants Array #MigrateToPHP7

PHP 5.6 Security Support will end in Dec 31, 2018. End of life of PHP 7.0 was Dec 3, 2018. There are no reason to not upgrade to PHP 7, and at least use PHP 7.1 #PHP71 #MigrateToPHP7

11. PHP 7.1 introduced Multiple Exception Types handling. This feature is needed when want to make same treatment for different Exception Types #MigrateToPHP7

8. PHP has two types of constants. The Constants and Class Constants. PHP 5.6 allowing Class Constants with Array Type. And in PHP 7 The Constants with Array Type added. #MigrateToPHP7

PHP 5.6 Security Support will end in Dec 31, 2018. End of life of PHP 7.0 was Dec 3, 2018. There are no reason to not upgrade to PHP 7, and at least use PHP 7.1 #PHP71 #MigrateToPHP7

10. PHP 5.3 release introduced namespace. And this made we have numerous use statements used to import classes from various namespaces. PHP 7 introduced goup use declarations #MigrateToPHP7

09. PHP 7 improved the Error Handling system by introducing Throwable interface, and moving the errors and exceptions under it. While \Exception is the base class for all PHP and user exceptions, \Error is the base class for all internal PHP errors. #MigrateToPHP7

6. PHP 7 introduced null coalesce ( ?? ) operator. It helps us to write shorter expressions. It returns the result of its first operand if it exists and is not null, or else its second operand. #MigrateToPHP7

2. In PHP 7 Type Hinting not just on function paramteter only, but it also can be apply to function return values. PHP will match the hinted return type, otherwise \TypeError Exception will be thrown #MigrateToPHP7

1. PHP Support Type Hinting in PHP5. But that was just for Object. And Array in PHP 5.1 In PHP 7 Scalar Type (int, float, string, bool) can be Type Hinted too. With strict types directive turned on, it will give \TypeError Exception when passing improper data type #MigrateToPHP7

15. PHP 7.1 introduce Void Return Types. Basically PHP did not required return statement in function defenition. By using void return type makes it clearer that function's purposed to perform an action, rather than producing a result #MigrateToPHP7

14. PHP 7.1 introduced Nullable Types. This was purposed to indicate a value can be null. It can be used in function param and function return. By use it, that type could be null and mandatory at the same type. It works both with Scalar Types and Compound Types #MigrateToPHP7

13. PHP 7.1 introduced Iterable Pseudo-Type. This will be used as a type declaration on a parameter or return type to indicate the value is iterable. This type accepts any array, any object implementing Traversable and Generator #MigrateToPHP7

7. PHP 7 introduced spaceship <=> operator. It offers combined comparison. After comparison, it follows these conditions: 1. It returns 0 if both operands are equal 2. It returns 1 if the left operand is greater 3. It returns -1 if the right operand is greater #MigrateToPHP7

5. PHP 5.5 has introducing Generator, but it lacked return expressions. And in PHP 7, support for return expressions added. We need to iterate over the generator, and once it's done, we can call the getReturn() method to retrieve the return value #MigrateToPHP7

3. PHP 7 support Anonymous Classes. Because sometimes there are cases where classes are only used during execution. These rare cases make it verbose to force a class definition separately when we know that the class is only being used once #MigrateToPHP7

12. Class Constant Visibility was public by default. PHP 7.1 introduced Class Constant Visibility (public, protected and private) declaration. But we can keep declare constant without any explicit visibility, similar to old behavior.And default visibility is public #MigrateToPHP7