How to detect duplicate values in PHP array?

Question

I am working with a one dimensional array in PHP. I would like to detect the presence of duplicate values, then count the number of duplicate values and out put the results. For example, given the following array:

$array = array('apple', 'orange', 'pear', 'banana', 'apple',    'pear', 'kiwi', 'kiwi', 'kiwi'); 

I would like to print:

apple (2) orange pear (2) banana kiwi (3) 

Any advice on how to approach this problem?

Thanks.

Mike

Answer 1

You can use array_count_values function

$array = array('apple', 'orange', 'pear', 'banana', 'apple', 'pear', 'kiwi', 'kiwi', 'kiwi');  print_r(array_count_values($array)); 

will output

Array (    [apple] => 2    [orange] => 1    [pear] => 2    etc... )