PHP Exercises: Check a given array of integers of length 1 or more and return true if the first element and the last element are equal in the given array

PHP Basic Algorithm: Exercise-87 with Solution

Write a PHP program to check a given array of integers of length 1 or more and return true if the first element and the last element are equal in the given array.

Sample Solution:

PHP Code :

<?php
// Define a function named 'test' that checks if the first and last element of an array are equal
function test($nums)
{ 
    // Check if the array is not empty and the first element is equal to the last element
    return sizeof($nums) > 0 && $nums[0] == $nums[sizeof($nums) - 1];
}

// Test the 'test' function with different arrays, then display the results
var_dump(test([10, 20, 40, 50]));
var_dump(test([10, 20, 40, 10]));
var_dump(test([12, 24, 35, 55]));
?>

Explanation:

• Function Definition:
• The function test is defined with one parameter:
• $nums: an array of numbers.
• Condition Check:
• The function checks two conditions:
• Array Not Empty: It verifies if the array is not empty using sizeof($nums) > 0.
• First and Last Elements Equality: It checks if the first element ($nums[0]) is equal to the last element ($nums[sizeof($nums) - 1]).
• Return Statement:
• The function returns true if both conditions are met (the array is not empty, and the first and last elements are equal); otherwise, it returns false.

Output:

bool(false)
bool(true)
bool(false)

Flowchart:

PHP Code Editor:

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