What are the new features of php7.4

This article focuses on "what are the new features of php7.4". Interested friends may wish to take a look. The method introduced in this paper is simple, fast and practical. Let's let the editor take you to learn what are the new features of php7.4.

1. Support intra-array unpacking-array extension Spread operator

2. Arrow function 2.0 (shorter closure)

Because anonymous functions or closed packages are mainly used for JS, they look verbose on PHP, and their implementation and program maintenance can be complex.

The introduction of arrow function support greatly simplifies the code of PHP developers and makes the syntax more concise. In this way, the readability and simplicity of your code will be greatly improved. Look at the following example.

If it was before, you must press the following code block to write:

Function cube ($n) {return ($n * $n * $n);} $a = [1,2,3,4,5]; $b = array_map ('cube', $a); print_r ($b)

The way php7.4 is written

A = [1,2,3,4,5]; $b = array_map (fn ($n) = > $n * $n * $n, $a); print_r ($b)

Because of the ability to create neat and short code. The web development process will be faster and save you time.

3. NULL merge operator

4. Weak citation

5. Covariant return and inverter parameters

6. Preload

7. New serialization mechanism for custom objects

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