How and When to use Arrow functions in PHP
#phparrowfunctions #rehanmanzoor
Whatsup guys!
In this video, I want to show you what are arrow functions, it's history and how to use arrow functions.
00:00 Introduction and History of PHP arrow functions
01:05 arrow functions in other languages such as javascript, c#, python
01:30 Practical examples of PHP closures vs PHP arrow functions
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Arrow functions
Arrow functions were introduced in PHP 7.4 as a more concise syntax for anonymous functions.
Both anonymous functions and arrow functions are implemented using the Closure class.
Arrow functions support the same features as anonymous functions, except that using variables from the parent scope is always automatic.
When a variable used in the expression is defined in the parent scope it will be implicitly captured by-value. In the following example, the functions $fn1 and $fn2 behave the same way.
References:
Arrow functions RFC: https://wiki.php.net/rfc/arrow_functi...
PHP Manual: https://www.php.net/manual/en/functio...
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