PHP Exercises: Count even number of elements in a given array of integers

Last update on April 16 2025 12:55:19 (UTC/GMT +8 hours)

106. Count Even Numbers in Array

Write a PHP program to count even number of elements in 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($nums)
 { 
    // Initialize a variable named $evens with a value of 0
    $evens = 0;

    // Iterate through the elements of the array using a for loop
    for ($i = 0; $i < sizeof($nums); $i++)
    {
        // Check if the current element is even (divisible by 2), increment $evens if true
        if ($nums[$i] % 2 == 0) $evens++;
    }

    // Return the count of even elements in the array
    return $evens;
 }   

// Call the 'test' function with an array [1, 5, 7, 9, 10, 12] and print the result
echo "Number of even elements: ". test([1, 5, 7, 9, 10, 12] );
?>

Sample Output:

Number of even elements: 2

Flowchart:

For more Practice: Solve these Related Problems:

• Write a PHP script to iterate over an array and count the number of even integers using a loop.
• Write a PHP function to filter an array for even numbers and then return the count of filtered elements.
• Write a PHP program to use array_filter() to create an array of even numbers and then count them.
• Write a PHP script to compute the count of even numbers in an array without using built-in filtering functions.

PHP Code Editor:

Click to Open Editor

Contribute your code and comments through Disqus.

Previous: Write a PHP program to create a new array taking the first two elements from a given array. If the length of the given array is less than 2 then return the give array.
Next: Write a PHP program to compute the difference between the largest and smallest values in a given array of integers and length one or more.