Delete all empty sub-array in array [closed]

Question

Closed. This question needs to be more focused. It is not currently accepting answers.

Want to improve this question? Guide the asker to update the question so it focuses on a single, specific problem. Narrowing the question will help others answer the question concisely. You may edit the question if you feel you can improve it yourself. If edited, the question will be reviewed and might be reopened.

Closed 5 years ago.

Improve this question

How can I filter array and delete all empty elements. I need to remove empty elements from an array, including arrays in arrays.

From that array:

$array = [
    'ip' => '127.0.0.1',
    'user_agent' => 'dkdkdk',
    '_id' => 'fjjfjf',
    'user' => [
        'longName' => '', 
        'shortName' => '',
        'username' => [
            'a' => 'b',
            'c' => ''
            ]
    ],
    'dsd' => [
        'zz' => [
            'dd' => [
                'ff' => ''
                ]
            ]
        ]
    ],
    'dsddd' => '',
    'vcv' => null,
    'aavx' => 0
];

I want get:

$array = [
    'ip' => '127.0.0.1',
    'user_agent' => 'dkdkdk',
    '_id' => 'fjjfjf',
    'user' => [
        'username' => [
            'a' => 'b',
            ]
    ],
    'aavx' => 0
];

I try use array_filter but it remove only not array keys

stackoverflow.com/a/6795671/1427878 - modify accordingly, so that the filtering happens by your specific criterion. — C3roe
– C3roe, Commented Mar 23, 2020 at 14:41
(And please pay a bit more attention when showing example data. What you have currently shown, is not even syntactically valid.) — C3roe
– C3roe, Commented Mar 23, 2020 at 14:53
Does this answer your question? PHP - How to remove empty entries of an array recursively? — M. Volf
– M. Volf, Commented Mar 23, 2020 at 17:11

mighty_dev · Accepted Answer · 2020-03-23 15:23:03Z

0

To remove all empty arrays or keys, you will have to iterate recursively and pass value by reference to the subsequent recursive calls to make sure you edit the same copy of the subarray. Now, you can just have empty checks and unset them.

function removeEmptyArrays(&$array){
    foreach($array as $key => &$value){
        if(is_array($value)) removeEmptyArrays($value);
        if(is_array($value) && count($value) == 0 || is_null($value) || is_string($value) && strlen($value) == 0) unset($array[$key]);
    }
}

Demo: https://3v4l.org/XDJdD

answered Mar 23, 2020 at 15:23

mighty_dev

17.8k3 gold badges24 silver badges39 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

Delete all empty sub-array in array [closed]

1 Answer 1

Comments

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Linked

Related