Count the keys of multi-dimension array php - php

Question

Maybe the title can not explain my question ,please see my example :
I have an multi-dimension array like this :
Array
(
[0] => Array
(
[name] => 'A'
[ec_dest_name] => 楽天testuser_998
),
[1] => Array
(
[name] => 'A'
[ec_dest_name] => 楽天testuser_998
),
[2] => Array
(
[name] => 'B'
[ec_dest_name] => 楽天testuser_998
),
[3] => Array
(
[name] => 'C'
[ec_dest_name] => 楽天testuser_998
)
)
I want to count the element by key name , it mean that I want to return an array like :
Array ('A' => 2 , 'B'=>1, 'C'=>1)
Any quick way to accomplish that , I could loop array and count but I think it is not a good idea
Thank in advanced

Answer 1

You can use array_count_values & array_column togather -
$counts = array_count_values(array_column($your_array, 'name'));
Output
array(3) {
["A"]=>
int(2)
["B"]=>
int(1)
["C"]=>
int(1)
}
Demo
As Mark Baker suggested for older PHP versions -
$counts = array_count_values(
array_map(function($value) {
return $value['name'];
}, $your_array)
);

Answer 2

You may as well do that with 2 Loops as shown below. You might test this also HERE.
<?php
$arrSections = array();
$arrCounts = array();
$arrMain = array(
array(
'name' => "A",
'ec_dest_name' => "楽天testuser_998",
),
array(
'name' => "A",
'ec_dest_name' => "楽天testuser_998",
),
array(
'name' => "B",
'ec_dest_name' => "楽天testuser_998",
),
array(
'name' => "C",
'ec_dest_name' => "楽天testuser_998",
),
);
// BUNDLE ARRAYS WITH SIMILAR name INTO ONE GROUP
// THUS CREATING A MULTI-DIMENSIONAL ARRAY WHOSE MAIN KEYS CORRESPOND TO
// THE name OF THE MEMBER ARRAYS IN THE GROUP.
foreach($arrMain as $iKey=>$subMain){
$name = $subMain['name'];
if(!array_key_exists($name, $arrSections)) {
$arrSections[$name] = array();
}
$arrSections[$name][] = $subMain;
}
// FETCH THE COUNTS OF EACH GROUP AND MAKE AN ARRAY OUT OF IT...
foreach($arrSections as $k=>$v){
$arrCounts[$k] = count($v);
}
var_dump($arrCounts);
//OUTPUTS::
array (size=3)
'A' => int 2
'B' => int 1
'C' => int 1