<?php
$groupByCols = ['a', 'b'];
$rows = [
[
'a' => 1,
'b' => 10,
'c' => 100
],
[
'a' => 1,
'b' => 20,
'c' => 200
],
[
'a' => 1,
'b' => 20,
'c' => 300
],
[
'a' => 1,
'b' => 30,
'c' => 400
],
[
'a' => 2,
'b' => 40,
'c' => 500
],
[
'a' => 2,
'b' => 50,
'c' => 600
],
[
'a' => 3,
'b' => 60,
'c' => 700
]
];
function group_by($array, $columns) {
$new_arr = array();
$column = array_shift($columns);
foreach ($array as $arr) {
$new_arr[$arr[$column]][] = $arr;
}
if (count($columns)) {
foreach ($new_arr as &$arr) {
$arr = group_by($arr, $columns);
}
}
return array_values($new_arr);
}
print_r(group_by($rows, $groupByCols));
- Output for 5.6.38, 7.1.0 - 7.1.23, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
- Array
(
[0] => Array
(
[0] => Array
(
[0] => Array
(
[a] => 1
[b] => 10
[c] => 100
)
)
[1] => Array
(
[0] => Array
(
[a] => 1
[b] => 20
[c] => 200
)
[1] => Array
(
[a] => 1
[b] => 20
[c] => 300
)
)
[2] => Array
(
[0] => Array
(
[a] => 1
[b] => 30
[c] => 400
)
)
)
[1] => Array
(
[0] => Array
(
[0] => Array
(
[a] => 2
[b] => 40
[c] => 500
)
)
[1] => Array
(
[0] => Array
(
[a] => 2
[b] => 50
[c] => 600
)
)
)
[2] => Array
(
[0] => Array
(
[0] => Array
(
[a] => 3
[b] => 60
[c] => 700
)
)
)
)
- Output for 8.3.5
- Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0
Array
(
[0] => Array
(
[0] => Array
(
[0] => Array
(
[a] => 1
[b] => 10
[c] => 100
)
)
[1] => Array
(
[0] => Array
(
[a] => 1
[b] => 20
[c] => 200
)
[1] => Array
(
[a] => 1
[b] => 20
[c] => 300
)
)
[2] => Array
(
[0] => Array
(
[a] => 1
[b] => 30
[c] => 400
)
)
)
[1] => Array
(
[0] => Array
(
[0] => Array
(
[a] => 2
[b] => 40
[c] => 500
)
)
[1] => Array
(
[0] => Array
(
[a] => 2
[b] => 50
[c] => 600
)
)
)
[2] => Array
(
[0] => Array
(
[0] => Array
(
[a] => 3
[b] => 60
[c] => 700
)
)
)
)
preferences:
177.36 ms | 409 KiB | 173 Q