Select keys where value is empty /array/php

Question

I have array,where is a lot of empty field. How can I remove the filled fields,and make new array with the empty fields. So,example:

[0] => Array
        (
            [id] => 26
            [user_type] => 2
            [user_name] => Julian
            [password] => b941da1629f4742de62796d51730edbb
            [fpassword] => 1
            [email] => [email protected]
            [name] => 
            [surname] => 
            [birthday] => 0000-00-00
            [country] => 
            [city] => 
            [adress] => 
            [post_code] => 
            [mob_number] => 77077412
            [tel_number] => 0
            [web_page] => 
            [registration_date] => 2016-11-19 05:03:05
            [active] => 1
            [activation_code] => 714779
            [last_login] => 2016-11-20 12:06:36
        )

So I want this:

[0] => Array
        (
            [name] => 
            [surname] => 
            [birthday] => 0000-00-00
            [country] => 
            [city] => 
            [adress] => 
            [post_code] => 
            [tel_number] => 0
            [web_page] => 

        )

I tired array_diff($data, array(''));,but nothing happend.Thx

Tomasz Kowalczyk · Accepted Answer · 2016-11-20 13:29:27Z

3

You need a "reverse" array_filter, like:

$empty = array_filter($data, function($item) {
    return empty($item);
});

But it needs to be tuned for various values, for example date 0000-00-00 is not "falsy" so it won't be caught by empty. The rule is that you need to return true from array_filter's callable for any value that you consider "empty".

The code you need in this example will be:

$data = [
    'int' => 100,
    'str' => 'val',
    'empty' => '',
    'null' => null,
    'date' => '0000-00-00',
];
$empty = array_filter($data, function($item) {
    return empty($item) || '0000-00-00' === $item;
});

edited Nov 20, 2016 at 13:29

answered Nov 20, 2016 at 11:58

Tomasz Kowalczyk

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Comments

justtry · Accepted Answer · 2016-11-20 12:06:35Z

0

You can do something like this, in $a1 - just keep rules which values you want to see in new array.

$a1 = array('empty' => '', 'another_rule' => '0000-00-00');
$a2 = array(
            'id' => 26,
            'user_type' => 2,
            'name' => '',
            'birthday' => '0000-00-00',
        );
$result = array_intersect($a2, $a1);

answered Nov 20, 2016 at 12:06

justtry

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1 Comment

Szabi Szabi Over a year ago

Working! Thx u so much!

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