note 126817 added to function.array-reduce

Let's see an example of array_reduce() to get the frequency of letters. <?php $items = "Hello"; $frequencies = array_reduce(str_split($items), function($result, $item) { if (isset($result[$item])) { $result[$item] += 1; } else { $result[$item] = 1; } return $result; }, [] // note the initial is an array ); print_r($frequencies); ?> and output should be like: Array ( [H] => 1 [e] => 1 [l] => 2 [o] => 1 ) ---- Server IP: 45.112.84.4 Probable Submitter: 80.90.5.135 (proxied: 103.121.60.46) ---- Manual Page -- https://php.net/manual/en/function.array-reduce.php Edit -- https://main.php.net/note/edit/126817 Del: integrated -- https://main.php.net/note/delete/126817/integrated Del: useless -- https://main.php.net/note/delete/126817/useless Del: bad code -- https://main.php.net/note/delete/126817/bad+code Del: spam -- https://main.php.net/note/delete/126817/spam Del: non-english -- https://main.php.net/note/delete/126817/non-english Del: in docs -- https://main.php.net/note/delete/126817/in+docs Del: other reasons-- https://main.php.net/note/delete/126817 Reject -- https://main.php.net/note/reject/126817 Search -- https://main.php.net/manage/user-notes.php