PHP Exercises: Check a given array of integers and return true if there are two values 15, 15 next to each other

Last update on May 28 2025 13:04:34 (UTC/GMT +8 hours)

131. Check for Two Adjacent 15's in Array

Write a PHP program to check a given array (length will be atleast 2) of integers and return true if there are two values 15, 15 next to each other.

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; $i++)
    {
        // Check if the next element is equal to the current element, and both are equal to 15
        if ($numbers[$i + 1] == $numbers[$i] && $numbers[$i] == 15) 
        {
            // If true, return true, indicating the presence of consecutive 15s
            return true;
        }
    }

    // If the loop completes without finding consecutive 15s, return false
    return false;
}   

// Use the 'var_dump' function to print the result of the 'test' function for different arrays
var_dump(test([5, 5, 1, 15, 15]));
var_dump(test([15, 2, 3, 4, 15]));
var_dump(test([3, 3, 15, 15, 5, 5]));
var_dump(test([1, 5, 15, 7, 8, 15]));
?>

Sample Output:

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

Flowchart:

For more Practice: Solve these Related Problems:

Write a PHP script to check if a given array of integers contains two consecutive values of 15.
Write a PHP function to scan an array for adjacent pairs that equal 15 and return true if found.
Write a PHP program to iterate over an array and detect if any two neighboring elements are both 15.
Write a PHP script to use index comparison to verify the presence of 15 appearing twice in a row in an array.

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PHP Code Editor:

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