(PHP 4 >= 4.0.0)
array_count_values() returns an array using the values of the input array as keys and their frequency in input as values.
Example 1. array_count_values() example
$array = array (1, "hello", 1, "world", "hello"); print_r(array_count_values ($array));
The printout of the above program will be:
Array ( [1] => 2 [hello] => 2 [world] => 1 )