PHP Exercises: Create a new array taking the first and last elements of a given array of integers and length 1 or more

Last update on December 20 2024 10:26:51 (UTC/GMT +8 hours)

Write a PHP program to create a new array taking the first and last elements of a given array of integers and length 1 or more.

Sample Solution:

PHP Code :

<?php
// Define a function named 'test' that takes an array of numbers as a parameter
function test($nums)
 { 
    // Return a new array containing the first and last elements of the input array
    return [$nums[0], $nums[sizeof($nums) - 1]];
 }   

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

// 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 containing the first and last elements using 'implode' and 'echo'
echo "New array: " . implode(',', $result);
?>

Explanation:

Function Definition:

A function named test is defined that takes one parameter:

$nums: an array of numbers.

Returning Elements:

The function returns a new array containing:

The first element of the input array ($nums[0]).
The last element of the input array ($nums[sizeof($nums) - 1]).

Array Initialization:

An array $a is created with the following numeric values:

$a = [10, 20, -30, -40, 30];

Display Original Array:

The contents of the original array $a are printed as a string using implode:

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 the first and last elements of the original array, is printed using implode.

Output:

Original array: 10,20,-30,-40,30
New array: 10,30

Flowchart:

PHP Code Editor:

Contribute your code and comments through Disqus.

Previous: 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.
Next: Write a PHP program to check if a given array of integers and length 2, contains 15 or 20.