Remove null elements array

Question

I have the array $wynik below.

How can I delete all keys with empty [id]??

I would like to refer to specific elements.

Array
(
    [0] => Array
        (
            [id] => 2531291225
            [ilosc] => 20
        )

    [1] => Array
        (
            [id] => 2531291312
            [ilosc] => 10
        )

    [2] => Array
        (
            [id] =>
            [ilosc] =>
        )
)

Solution:

foreach ($wynik as $key => $value) {
    if (is_array($value)) {
        foreach ($value as $key2 => $value2) {
            if (empty( $value2))
                unset($wynik[$key][$key2]);
        }
    }
    if (empty($wynik[$key]))
        unset($wynik[$key]);
}

Refer [link](http://stackoverflow.com/questions/3654295/remove-empty-array-elements) for more details. — Vinay, Aug 10 '12 at 07:32

score 3 · Answer 1 · answered Aug 10 '12 at 07:26

3

$filtered = array_filter($wynik, function ($v) {
  return !empty($v['id']);
});

answered Aug 10 '12 at 07:26

Yoshi

54,081
14
89
103

How refer to specific elements in my array?? – damian Aug 10 '12 at 09:22
@damian Sorry, I don't understand your question. – Yoshi Aug 10 '12 at 09:36
I do update the database. For each element in the array I need to do an if statement. How? if (id = id && ilosc < ilosc ){} – damian Aug 10 '12 at 09:44
@damian you mean, after the array has been stripped of emtpy elements? – Yoshi Aug 10 '12 at 09:46
Can this be?: foreach( $wynik as $key => $value ) { //print_array($value); $ilosc = $wynik[$key]['ilosc']++; $id = $wynik[$key]['id']++; echo $ilosc .' - '. $id .'
'; } – damian Aug 10 '12 at 09:53
@damian well, just traverse the now filtered array (e.g. `$filtered` from above) like you normally would (for example using `foreach`) and do whatever needs to be done with those values. – Yoshi Aug 10 '12 at 09:54

score 0 · Answer 2 · answered Aug 10 '12 at 07:30

0

$result=array();
foreach($wynik as $key=>$value)
{
    if($value['id']!=NULL)
        $result=array_merge($result,array($key=>$value));
}
var_dump($result);

answered Aug 10 '12 at 07:30

Wenhuang Lin

214
2
8

score 0 · Answer 3 · answered Aug 10 '12 at 08:15

0

foreach( $wynik as $key => $value ) {
    if( is_array( $value ) ) {
        foreach( $value as $key2 => $value2 ) if(!empty($value2)) $Row[$key2] = $value2; 
    }
}

answered Aug 10 '12 at 08:15

RDK

4,540
2
20
29

Remove null elements array

3 Answers3