PHP Exercises: Find out the maximum element between the first or last element in a given array of integers, replace all elements with maximum element

Last update on May 28 2025 13:04:53 (UTC/GMT +8 hours)

92. Replace All Elements with Maximum of Boundaries

Write a PHP program to find out the maximum element between the first or last element in a given array of integers ( length 4), replace all elements with maximum element.

Sample Solution:

PHP Code :

<?php
// Define a function named 'test' that takes an array of numbers as a parameter
function test($nums)
 { 
    // Find the maximum value in the array using the 'max' function
    $max = max($nums);

    // Return a new array containing four copies of the maximum value
    return [$max, $max, $max, $max];
 }   

// Create an array $a with some numeric values
$a = [10, 20, -30, -40];

// Print the original array as a string using 'implode' and 'echo'
echo "Original array: " . implode(',', $a) . "\n";

// Call the 'test' function with the array $a and store the result in $result
$result = test($a);

// Print the new array with four copies of the maximum values using 'implode' and 'echo'
echo "New array with maximum values: " . implode(',', $result);
?>

Explanation:

Function Definition:

A function named test is defined with one parameter:

$nums: an array of numbers.

Finding Maximum Value:

Inside the function, the maximum value of the array is determined using the built-in max function:

max($nums) calculates the largest number in the array.

Returning a New Array:

The function returns a new array containing four copies of the maximum value:

[$max, $max, $max, $max] creates an array with the maximum value repeated four times.

Array Initialization:

An array $a is created with the values: [10, 20, -30, -40].

Display Original Array:

The original array is displayed using echo and implode to format the array as a string:

Function Call:

The test function is called with the array $a, and the result is stored in the variable $result.

Display New Array:

The new array, which contains four copies of the maximum value, is displayed using echo and implode to format it as a string.

Output:

Original array: 10,20,-30,-40
New array with maximum values: 20,20,20,20

Flowchart:

For more Practice: Solve these Related Problems:

Write a PHP script to find the maximum between the first and last elements in an array and then replace all elements with this maximum value.
Write a PHP function to determine the greater of an array's boundary elements and create a new array filled with that value.
Write a PHP program to extract the first and last numbers of a four-element array and overwrite the array with their maximum.
Write a PHP script to compare boundary values of an array and populate a new array entirely with the larger one.

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