array_count_values(array)$animals = array(
	"Cat",
	"Cat",
	"Dog",
	"Rabbit",
	"Rabbit",
	"Dog",
	"Dog",
	"Dog",
	"Cat",
	);
print_r (array_count_values($animals));
/* outputs: 
Array
(
    [Cat] => 3
    [Dog] => 4
    [Rabbit] => 2
)
*/