Using Return in a Loop in PHP

The fact that return is located inside a loop is not always a mistake.

The following example shows a function that determines how many of the first elements of an array need to be added so that the sum becomes greater than or equal to 10:

<?php
	function func($arr) {
		$length = count($arr);
		$sum = 0;
		
		for ($i = 0; $i < $length; $i++) {
			$sum += $arr[$i];
			
			// If the sum is greater than or equal to 10:
			if ($sum >= 10) {
				return $i + 1; // exit the loop and the function
			}
		}
	}
	
	$res = func([1, 2, 3, 4, 5]);
	echo $res;
?>

The following example shows a function that calculates how many integers, starting from 1, need to be added so that the result is greater than 100:

<?php
	function func() {
		$sum = 0;
		$i = 1;
		
		while (true) { // infinite loop
			$sum += $i;
			
			if ($sum >= 100) {
				return $i; // the loop runs until it exits here
			}
			
			$i++;
		}
	}
	
	echo func();
?>

Write a function that will take a number as a parameter and divide it by 2 as many times as needed until the result becomes less than 10. Let the function return the number of iterations that were required to achieve the result.