get_array_type.php

<?php

/**
 * @link https://l-x.github.io/blog/2014/09/03/determine-the-type-of-a-php-array/
 * 
 * @param array $array
 *
 * @return int
 */
function get_array_type(array $array) {
	$keyvalue_count = count(array_filter(array_keys($array), 'is_string'));
	
	switch ($keyvalue_count) {
		case 0: 		return 0; // completely indexed or empty array
		case count($array): 	return 1; // completely key=>value based array
		default: 		return 2; // mixed array
	}
}