Definition: Groups.php: A PHP function that calculates the total number of items in an associative array, returning an integer value indicating how many keys there are. Definition: Groups.php is a PHP function used to count the number of key-value pairs within an associative array. The argument passed to this function should be an array, and the return value will be an integer representing the total number of key-value pairs. It's commonly used in programming languages like PHP or Java to count objects or data structures.