PHP Exercises: Check a given array of integers and return true if the array contains three increasing adjacent numbers

Last update on December 20 2024 10:26:00 (UTC/GMT +8 hours)

Write a PHP program to check a given array of integers and return true if the array contains three increasing adjacent numbers.

Sample Solution:

PHP Code :

<?php
// Define a function named 'test' that takes an array of numbers as a parameter
function test($numbers)
{ 
    // Iterate through the elements of the array using a for loop
    for ($i = 0; $i <= sizeof($numbers) - 3; $i++)
    {
        // Check if the current element is equal to the next element minus 1
        // and if the current element is equal to the element after the next element minus 2
        if ($numbers[$i] == $numbers[$i + 1] - 1 && $numbers[$i] == $numbers[$i + 2] - 2)
        {
            // Return true if the condition is met
            return true;
        }
    }

    // Return false if the condition is not met for any set of three consecutive elements
    return false;
}   

// Use 'var_dump' to print the result of calling 'test' with different arrays
var_dump(test([1, 2, 3, 5, 3, 7]));
var_dump(test([3, 7, 5, 5, 3, 7]));
var_dump(test([3, 7, 5, 5, 6, 7, 5]));
?>

Sample Output:

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

Flowchart:

PHP Code Editor:

Contribute your code and comments through Disqus.

Previous: Write a PHP program to check a given array of integers and return true if the specified number of same elements appears at the start and end of the given array.
Next: Write a PHP program to shift an element in left direction and return a new array.