Removing array from multi-dimensional array if it only has 1 key

Question

Array
(
[9-1] => Array
    (
        [intensity] => 1
        [time] => 43932
    )

[9-2] => Array
    (
        [intensity] => 1
    )

[85-1] => Array
    (
        [intensity] => 1
        [time] => 40271
    )

[85-2] => Array
    (
        [intensity] => 1
    )

)

How would I remove the sub-arrays that have only 1 key, and that is 'intensity'?

Look here: stackoverflow.com/questions/7551386/… and here stackoverflow.com/questions/10835511/remove-subarray-with-php — user1326628
– user1326628, Commented Dec 26, 2012 at 13:50
I understand how to unset an array. What I do not know how is how to target a subarray that has just 1 key and that key is a certain word. — ditto
– ditto, Commented Dec 26, 2012 at 13:52
Set up a temp array, loop through your array, keep what you want, and then overwrite the original array with the temp. What's stopping you? — user554546
– user554546, Commented Dec 26, 2012 at 13:55

deceze · Accepted Answer · 2012-12-26 13:55:18Z

6

$array = array_filter($array, function (array $i) {
    return count($i) != 1 || key($i) != 'intensity';
});

answered Dec 26, 2012 at 13:55

deceze♦

525k89 gold badges806 silver badges954 bronze badges

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

Comments

Maxime Pacary · Accepted Answer · 2012-12-26 13:56:03Z

3

foreach($yourArray as $key => $value)
  if (is_array($value) && count($value) == 1 && isset($value['intensity']))
    unset($yourArray[$key]);

answered Dec 26, 2012 at 13:56

Maxime Pacary

23.2k12 gold badges92 silver badges117 bronze badges

2 Comments

user554546 Over a year ago

Are you sure that it's wise to remove elements from the array as you're iterating over it?

Maxime Pacary Over a year ago

@Jack: should be Ok in case of foreach loops (PHP will work on a copy of the array during the loop) check stackoverflow.com/questions/10057671/how-foreach-actually-works and some comments here: stackoverflow.com/questions/2852344/… however, deceze's answer is not 'ambiguous' on that point and IMO is the way to go if you use PHP 5.3+

Collectives™ on Stack Overflow

Removing array from multi-dimensional array if it only has 1 key

2 Answers 2

Comments

2 Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

2 Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related