(PHP 4, PHP 5, PHP 7)
array_count_values — Counts all the values of an array
$array
   )
   array_count_values() returns an array using
   the values of array as keys and
   their frequency in array as values.
  
arrayThe array of values to count
   Returns an associative array of values from array as
   keys and their count as value.
  
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
)