PHP Exercises: Create new array from a given array of integers shifting all even numbers before all odd numbers

Last update on December 20 2024 10:26:03 (UTC/GMT +8 hours)

Write a PHP program to create new array from a given array of integers shifting all even numbers before all odd numbers.

Sample Solution:

PHP Code :

<?php
// Define a function named 'test' that takes an array of numbers as a parameter
function test($numbers)
{ 
    // Initialize a variable '$index' to keep track of the position of even numbers
    $index = 0;

    // Iterate through the elements of the input array using a for loop
    for ($i = 0; $i < sizeof($numbers); $i++)
    {
        // Check if the current element is an even number
        if ($numbers[$i] % 2 == 0)
        {
            // Swap the current even number with the one at the position indicated by '$index'
            $temp = $numbers[$index];
            $numbers[$index] = $numbers[$i];
            $numbers[$i] = $temp;

            // Increment '$index' to the next position for the next even number
            $index++;
        }
    }

    // Return the modified array with even numbers moved to the front
    return $numbers;
}   

// Call the 'test' function with an example array and store the result in the variable 'result'
$result = test([1, 2, 5, 3, 5, 4, 6, 9, 11]);

// Print the result array as a string
echo "New array: " . implode(',', $result);
?>

Sample Output:

New array: 2,4,6,3,5,1,5,9,11

Flowchart:

PHP Code Editor:

Click to Open Editor

Contribute your code and comments through Disqus.

Previous: Write a PHP program to create a new array after replacing all the values 5 with 0 shifting all zeros to right direction.
Next: 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.