(PHP 4 )
array_count_values() returns an array using the values of the input array as keys and their frequency in input as values.
範例 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 )