Sort Multi dimensional array by Value and not include to sorting if priority value is 0

Question

I have to sort below given array by Priority. If priority value is 0 then not include in sorting array. I have tried many ways but not getting output as expected.

Array
(
[recently_viewed] => Array
    (
        [priority] => 1
        [no_of_products] => 1
    )

[recently_visited_cat] => Array
    (
        [priority] => 1
        [no_of_products] => 1
    )

[last_ordered_items] => Array
    (
        [priority] => 3
        [no_of_products] => 3
    )

[searched_based] => Array
    (
        [priority] => 0
        [no_of_products] => 4
    )

[cart_based] => Array
    (
        [priority] => 1
        [no_of_products] => 5
    )

[wishlist_based] => Array
    (
        [priority] => 1
        [no_of_products] => 6
    )

[sku_based] => Array
    (
        [priority] => 0
        [no_of_products] => 7
    )
)

Please help me with this.

Possible duplicate of [How to Sort Multi-dimensional Array by Value?](https://stackoverflow.com/questions/2699086/how-to-sort-multi-dimensional-array-by-value) — , Apr 10 '19 at 06:45
I have also tried it but not working. so posted new question. — Magecode, Apr 10 '19 at 06:46
I guess you should use `array_filter` for priority 0 before sorting — dWinder, Apr 10 '19 at 06:49

score 1 · Answer 1 · answered Apr 10 '19 at 06:53

1

You can use array_filter() function to exclude records with 0 priority. After it you can sort the array with help uasort() function. For example:

$arr = array_filter($arr, function($element) {
    return $element['priority'] > 0;
});

uasort($arr, function ($a, $b) {
    if ($a['priority'] === $b['priority']) {
        return 0;
    }
    return ($a['priority'] < $b['priority']) ? -1 : 1;
});

answered Apr 10 '19 at 06:53

Maksym Fedorov

6,383
2
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Your `uasort` callback code can simply be `return $a['priority'] <=> $b['priority']` or `return $a['priority'] - $b['priority']` (pre PHP7). Note that it also depends if a higher priority has a higher or lower priority value (otherwise just switch operands). – Jeto Apr 10 '19 at 06:55
@Jeto of course, but I don't know what PHP version use author, therefore I don't use <=> operator – Maksym Fedorov Apr 10 '19 at 07:03
Right--the other alternative (with `-`) works on any version though. – Jeto Apr 10 '19 at 07:13

dWinder · Answer 2 · 2019-04-10T07:06:19.877

1

You can us array_filter (doc - for check bigger then 0) and then uasort (doc):

$arr = [];
$arr["recently_viewed"] = ["priority" => 1, "no_of_products" =>1];
$arr["searched_based"] = ["priority" => 0, "no_of_products" =>4];
$arr["last_ordered_items"] = ["priority" => 3, "no_of_products" =>3];

$arr = array_filter($arr, function ($e) {return $e["priority"];});
uasort($arr, function($a, $b) {
    return $a['priority'] - $b['priority'];
});

Live example: 3v4l

edited Apr 10 '19 at 07:06

answered Apr 10 '19 at 06:55

dWinder

11,597
3
24
39

If priority is 1 then it should be in first in array. – Magecode Apr 10 '19 at 07:06
@Magecode - I make desc order - update the order of the `$a` and `$b` - now it is asc – dWinder Apr 10 '19 at 07:07

score 0 · Answer 3 · answered Apr 10 '19 at 08:15

0

You can use array_filter with callback function to remove the values with ZERO

$arr = array_filter($arr, function ($e) {return $e["priority"];});

This will remove all the sub-array which has priority values ZERO.

Now you can apply usort to sort the array

usort($arr, function($a, $b)  {
    return $a['priority'] <=> $b['priority'];
});

See Working Code Live

answered Apr 10 '19 at 08:15

Rakesh Jakhar

6,380
2
11
20

First notice the keys of the array - OP probably want to keep them - so use `uasort` and not `usort`. Second - what is different here then other answer? – dWinder Apr 10 '19 at 08:22

Sort Multi dimensional array by Value and not include to sorting if priority value is 0

3 Answers3