Remove empty arrays from multidimensional array

Question

I've got an array I use in a FormValidator class, but at some point I end up with an array sort of like the following. But I would like to remove all empty arrays from that array so that in my validation it's not gonna check for values inside the empty array, which is inefficient.

Is there a function to remove empty arrays from multidimensional arrays?

I know about array_filter() but that seems to only work with array element values.

array(2)
{
  ["recaptcha_response_field"]=>
  array(0) {
  }
  ["terms"]=>
  array(0) {
  }
}

sunny · Accepted Answer · 2014-04-16 11:25:28Z

15

try this- This will remove empty arrays as well inside array!

$array['recaptcha_response_field'] = array(
   'name'=>'name1',
   'email'=>'email1',
   'empty'=>''
);
$array['terms'] = array(
   'name'=>'name2',
   'email'=>'email2',
   'empty'=>''
);

$array['terms2'] = array();


$array= array_filter(array_map('array_filter', $array));

print_r($array);

OUTPUT-Array
(
    [recaptcha_response_field] => Array
        (
            [name] => name1
            [email] => email1
        )

    [terms] => Array
        (
            [name] => name2
            [email] => email2
        )

)

edited Apr 16, 2014 at 11:25

answered Apr 16, 2014 at 11:11

sunny

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Comments

Florian Doyen · Accepted Answer · 2014-04-16 11:23:34Z

2

$array = array(array('foo','bar'), array('hi',''), array('',''), array('','hello')); 
$array = array_filter(array_map('array_filter', $array));
print_r($array);

will show :

Array ( [0] => Array ( [0] => foo [1] => bar ) [1] => Array ( [0] => hi ) [3] => Array ( [1] => hello ) )

answered Apr 16, 2014 at 11:23

Florian Doyen

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Comments

Shankar Narayana Damodaran · Accepted Answer · 2014-04-16 11:15:30Z

1

Use a simple foreach with array_filter and count as the call-back function.

foreach($arr as $k=>&$arr)
{
    array_filter($arr,'count');
}
print_r($arr);

Working Demo

answered Apr 16, 2014 at 11:15

Shankar Narayana Damodaran

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Comments

Hardik Thaker · Accepted Answer · 2014-04-16 11:24:05Z

0

Use array_filter function to remove an element from array. To identify the null elements fire recursive loop. hope it will work !

edited Apr 16, 2014 at 11:24

answered Apr 16, 2014 at 11:16

Hardik Thaker

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