PHP Manual
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(PHP 4, PHP 5)
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
<?php$array = array(1, "hello", 1, "world", "hello");print_r(array_count_values($array));?>
The above example will output:
Array ( [1] => 2 [hello] => 2 [world] => 1 )
See also count(), array_unique(), array_values(), and count_chars().