check-odd-even.php

<?php 
// Check whether a number is odd or even.
if (!function_exists('checkOddEven')) {
    function checkOddEven($number){ 
        if($number % 2 == 0){ 
            echo "Even";  
        } 
        else{ 
            echo "Odd"; 
        } 
    } 
}
  
// to output
$value = 12; 
checkOddEven($value);
?>