PHP Exercises: Check if the value of each element is equal or greater than the value of previous element of a given array of integers

Last update on May 28 2025 13:07:06 (UTC/GMT +8 hours)

130. Check Non-Decreasing Order of Array

Write a PHP program to check if the value of each element is equal or greater than the value of previous element of a given array of integers.

Sample Solution:

PHP Code :

<?php
// Define a function named 'test' that takes an array of numbers as a parameter
function test($numbers)
{ 
    // Iterate through the elements of the input array using a for loop
    for ($i = 0; $i < sizeof($numbers) - 1; $i++)
    {
        // Check if the next element is less than the current element
        if ($numbers[$i + 1] < $numbers[$i]) 
        {
            // If true, the array is not in ascending order, so return false
            return false;
        }
    }

    // If the loop completes without returning false, the array is in ascending order, so return true
    return true;
}   

// Use the 'var_dump' function to print the result of the 'test' function for different arrays
var_dump(test([5, 5, 1, 5, 5]));
var_dump(test([1, 2, 3, 4]));
var_dump(test([3, 3, 5, 5, 5, 5]));
var_dump(test([1, 5, 5, 7, 8, 10]));
?>

Sample Output:

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

Flowchart:

For more Practice: Solve these Related Problems:

Write a PHP script to determine if an array is sorted in non-decreasing order by comparing each element with its predecessor.
Write a PHP function to iterate over an array and return true if every element is equal or greater than the previous one.
Write a PHP program to use a loop to verify that no element in the array is less than the one that comes before it.
Write a PHP script to implement a check for non-decreasing order and output a boolean based on the result.

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