Remove empty array elemnts from array without knowing keys

Question

I have an array where I do not know what the keys are called and I am trying to remove all the items from array where all of the sub keys are empty (wihout value).

My array could look like this. The second element [1] has empty values so I would like to remove it and only leave the first element [0].

Array
(
    [0] => Array
        (
            [Some key here] => 26542973
            [generated key] => John
            [who knows what key] => 10
        )

    [1] => Array
        (
            [Some key here] => 
            [generated key] => 
            [who knows what key] => 
        )

)

I tried using array filter but it did not remove the empty element. It left both of them in the array.

$filtered_array = array_filter($array);

I would like to have the end result look like this (empty element removed).

Array
(
    [0] => Array
        (
            [Some key here] => 26542973
            [generated key] => John
            [who knows what key] => 10
        )
)

So what should happen if only one of the sub elements are empty for example just [Some key here] — RiggsFolly
– RiggsFolly, Commented Oct 31, 2018 at 10:51
It should remove only if all sub elements are empty. I should update the question. — Liga
– Liga, Commented Oct 31, 2018 at 10:53
Have a look through stackoverflow.com/questions/9895130/… as it covers quite a few scenarios. — Nigel Ren
– Nigel Ren, Commented Oct 31, 2018 at 10:54

Dave · Accepted Answer · 2018-10-31 10:55:21Z

4

Use array_map with array_filter.

$array = array(array('data1','data1'), array('data2','data2'), array('','')); 
$array = array_filter(array_map('array_filter', $array));
print_r($array);

DEMO

edited Oct 31, 2018 at 10:55

answered Oct 31, 2018 at 10:52

Dave

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1 Comment

Nigel Ren Over a year ago

If you have array('data3','') this will remove the empty element, is that what is needed?

Mohammad · Accepted Answer · 2018-10-31 11:02:18Z

2

You can use array_filter() as shown in bottom. So you need to join items of inner array using implode() and check that result is empty or not.

$arr = array_filter($arr, function($val){
    return implode("", $val) != "";
});

Check result in demo

edited Oct 31, 2018 at 11:02

answered Oct 31, 2018 at 10:57

Mohammad

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4 Comments

Liga Over a year ago

It left all of the empty ones and removed the ones with values (the opposite effect)

Mohammad Over a year ago

@Liga Bug fixed :)

Liga Over a year ago

Does it require all sub items to be empty or just one?

Mohammad Over a year ago

@Liga All as you said.

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