Why Would You Use Or Create a Higher-Order Function?
You might create higher-order functions within your code for a variety of reasons. You can use code flexibility, code reuse, and code extension to copy a solution from another program. There are many reasons, but we will only cover a few. PHP Training in Chennai gives in-depth knowledge in PHP functional programming.
Adding code flexibility
They greatly enhance the flexibility of PHP functional programming. Based on the examples, you can probably see many uses for this type of function. Creating a single function that accepts several functions and then using them all without writing code is possible.
Perhaps the higher-order function doesn’t know which type of function it will get. Who said the function had to know everything about the function it is receiving? The input function could be an additional function or a division function. It works in both cases.
Expand your code easily.
It is also easier to add more input PHP built-in functions later. Suppose you have added and divided (), but later you will need to add a sum() operation. Writing the sum() function and pipe it through the higher-order function is possible. In a later example, we’ll show you how to use this functionality to create our calcul() function.
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Copy features from another language
You might also want to use higher-order functions in PHP to emulate the behaviour of decorators in Python. To modify the behaviour of a function, you can “wrap” it within another function.
You could, for example, write a function that multiplies other functions. A higher-order function takes in a function and calls it. The timer then stops to show how long has passed.
Examples for Existing Higher-Order Functions In PHP
It is easy to find examples in PHP of higher-order functions. You can look at the PHP documentation to find a function or method that accepts a callable input parameter.
Here are some examples of higher-order functions that are commonly used. These functions might be familiar to you even though they may not have been higher-order.
The dynamic duo of a higher order: array_map & array_filter
$arrayOfNums = [1,2,3,4,5];
// array_map – An example of using an anonymous inline function
$doubledNums = array_map(function($num) {
return $num * 2;
}, $arrayOfNums);
var_dump($doubledNums); // Prints out array containing [2, 4, 6, 8, 10];
Conclusion:
Here we discussed the Higher-order PHP functional programming. If you desire to learn more technical concepts in PHP, step into FITA Academy for the best PHP Training in Coimbatore under the guidance of industry experts.