<?php
$arr = [
'itemA' => [
'product_id' => 1,
'category_id' => 1,
],
'itemB' => [
'product_id' => 2,
'category_id' => 2,
],
'itemC' => [
'product_id' => 3,
'category_id' => 1,
],
'itemE' => [
'product_id' => 4,
'category_id' => 1,
],
'itemD' => [
'product_id' => 5,
'category_id' => 2,
],
];
uasort($arr, function ($a, $b) {
if ($a['category_id'] == $b['category_id']) {
return $a['product_id'] - $b['product_id'];
}
return $a['category_id'] < $b['category_id'] ? -1 : 1;
});
var_dump($arr);
- Output for 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.4, 8.3.6 - 8.3.7
- array(5) {
["itemA"]=>
array(2) {
["product_id"]=>
int(1)
["category_id"]=>
int(1)
}
["itemC"]=>
array(2) {
["product_id"]=>
int(3)
["category_id"]=>
int(1)
}
["itemE"]=>
array(2) {
["product_id"]=>
int(4)
["category_id"]=>
int(1)
}
["itemB"]=>
array(2) {
["product_id"]=>
int(2)
["category_id"]=>
int(2)
}
["itemD"]=>
array(2) {
["product_id"]=>
int(5)
["category_id"]=>
int(2)
}
}
- 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(5) {
["itemA"]=>
array(2) {
["product_id"]=>
int(1)
["category_id"]=>
int(1)
}
["itemC"]=>
array(2) {
["product_id"]=>
int(3)
["category_id"]=>
int(1)
}
["itemE"]=>
array(2) {
["product_id"]=>
int(4)
["category_id"]=>
int(1)
}
["itemB"]=>
array(2) {
["product_id"]=>
int(2)
["category_id"]=>
int(2)
}
["itemD"]=>
array(2) {
["product_id"]=>
int(5)
["category_id"]=>
int(2)
}
}
preferences:
160.78 ms | 403 KiB | 158 Q