How To work with Recursive Function in PHP Tutorial

Inside this article we will see the concept i.e How To work with Recursive Function in PHP Tutorial. Article contains the classified information about working with Recursive function.

Recursion performs a number of repetitive calls to the function from within the function. The recursive condition performs the repeating calls to the function until the base case is met.

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What is Recursive Function in PHP?

A recursive function in PHP is a function that calls itself until a specified condition is met. The function performs a task by dividing it into smaller, manageable steps and calling itself repeatedly until the task is completed. Recursive functions are often used in programming to solve complex problems in a more simplified and efficient manner.

Here, a pictorial view

A Basic Example of Recursive Function

Here’s a simple example to demonstrate recursion:

<?php
  
function factorial($number) {
  if ($number <= 1) {
      return 1;
  } else {
      return $number * factorial($number - 1);
  }
}

$result = factorial(5);
echo $result; // 120

In this example, the factorial function calculates the factorial of a given number. The function checks if the number is less than or equal to 1, and if it is, it returns 1. If not, it returns the product of the number and the result of calling the factorial function with $number-1. This continues until the condition $number <= 1 is met, at which point the function stops calling itself and returns the final result.

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