PHP Exercises: Find the largest value from first, last, and middle elements of a given array of integers of odd length

Last update on May 28 2025 13:07:18 (UTC/GMT +8 hours)

104. Largest from First, Last, and Middle

Write a PHP program to find the largest value from first, last, and middle elements of a given array of integers of odd length (atleast 1).

Sample Solution:

PHP Code :

<?php
// Define a function named 'test' that takes an array of numbers as a parameter
function test($numbers)
 { 
    // Store the value of the first element in a variable named $first
    $first = $numbers[0];
    
    // Store the value of the middle element in a variable named $middle_ele
    $middle_ele = $numbers[sizeof($numbers) / 2];
    
    // Store the value of the last element in a variable named $last_ele
    $last_ele = $numbers[sizeof($numbers) - 1];
    
    // Initialize a variable named $max_ele with the value of $first
    $max_ele = $first;

    // Check if $middle_ele is greater than $max_ele, update $max_ele if true
    if ($middle_ele > $max_ele)
    {
        $max_ele = $middle_ele;
    }

    // Check if $last_ele is greater than $max_ele, update $max_ele if true
    if ($last_ele > $max_ele)
    {
        $max_ele = $last_ele;
    }

    // Return the maximum value among the three elements
    return $max_ele;
 }   

// Call the 'test' function with different arrays and print the results
echo test([1]) . "\n";
echo test([1,2,9]) . "\n";
echo test([1,2,9,3,3]) . "\n";
echo test([1,2,3,4,5,6,7]) . "\n";
echo test([1,2,2,3,7,8,9,10,6,5,4]) . "\n";
?>

Sample Output:

Flowchart:

For more Practice: Solve these Related Problems:

Write a PHP script to compare the first, middle, and last elements of an odd-length array and return the maximum.
Write a PHP function to extract the boundary and central elements from an array and output the largest among them.
Write a PHP program to compute and compare three key elements (first, center, last) and display the highest value.
Write a PHP script to use conditional operators to determine the largest value among the first, middle, and last numbers in an array.

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