How to remove empty value of array

Question

i'm looking for a way to remove empty values from a array.

If you see the code below, i'm trying to remove the empty values that get passed through before attaching it to the model. But this hasn't turned out this way so far.

Ofcourse i searched the web before asking, and so i know that trim() doesn't give the desired effect aswell as array_map() and the code below.

Looking for solutions, thanks!

if(Input::get('addcategorie'))
    {
        $new_cats = array();
        foreach(
            explode(
                ',', Input::get('addcategorie')) as $categorie) 
        {
            $categorie = Categorie::firstOrCreate(array('name' => $categorie));
            foreach($new_cats as $newcat)
            if($newcat == ' ' || $newcat == '&nbsp;' || $newcat == ''){
                unset($newcat);
            }
            array_push($new_cats, $categorie->id);
        }
        $workshop->categories()->attach($new_cats); 
    }

use the array_values method.

Matt Burrow
– Matt Burrow

2014-07-04 13:14:57 +00:00
Commented Jul 4, 2014 at 13:14 — Matt Burrow
– Matt Burrow, Commented Jul 4, 2014 at 13:14
Can you explain @MattBurrow?

Jeroen
– Jeroen

2014-07-04 13:21:23 +00:00
Commented Jul 4, 2014 at 13:21 — Jeroen
– Jeroen, Commented Jul 4, 2014 at 13:21
@NicolasHenrard you posted link to Javascript question

zavg
– zavg

2014-07-04 13:23:09 +00:00
Commented Jul 4, 2014 at 13:23 — zavg
– zavg, Commented Jul 4, 2014 at 13:23

Patrick Maciel · Accepted Answer · 2014-07-04 13:36:15Z

4

Just use array_filter:

$array = [
    0 => 'Patrick',
    1 => null,
    2 => 'Maciel',
    3 => '&nbsp',
    4 => '&nbsp;'
];

$filtered = array_filter($array);

$nbsp = array_filter($array, function($element) {
    return $element == '&nbsp' OR  $element == '&nbsp;';
});

$clean = array_diff($filtered, $nbsp);

The return is:

array(2) {
  [0]=>
  string(7) "Patrick"
  [2]=>
  string(6) "Maciel"
}

This functions remove all null, empty and &nbsp from your arrays.

edited Jul 4, 2014 at 13:36

answered Jul 4, 2014 at 13:22

Patrick Maciel

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7 Comments

Zemistr Over a year ago

And what ' ' ? :)

TiMESPLiNTER Over a year ago

Please note that also values which are an empty string or false get stripped out of the array. But I think it's the best solution for what the TS wanted to achieve.

Jeroen Over a year ago

Somehow it still adds the empty value as a new category. Could it be that the 'problem' is at 'firstOrCreate' ?

Jeroen Over a year ago

If i follow the code, it all makes sense and it should work, but somehow it doesn't. I'm quite certain the problem is at 'firstOrCreate'. I'll take a deeper look into that. Thanks!

Patrick Maciel Over a year ago

@Jeroen maybe is your file encoding. Don't forget to mark the question as solved if is really that you said.

|

zavg · Accepted Answer · 2014-07-04 13:18:38Z

1

You should use the following code to unset in foreach:

foreach($new_cats as $key => $newcat) {
    if(yourCondition) {
        unset($new_cats[$key])
    }
}

answered Jul 4, 2014 at 13:18

zavg

11.2k4 gold badges47 silver badges68 bronze badges

1 Comment

Jeroen Over a year ago

Thanks for your answer, but this also does the same. Empty values are not removed.

Zemistr · Accepted Answer · 2014-07-04 13:38:23Z

0

foreach($new_cats as $newcat_i => $newcat) {
    $newcat = trim($newcat);

    if($newcat == '&nbsp;' || $newcat == '') {
        unset($new_cats[$newcat_i]);
    }
}

OR

$new_cats = array_filter(
    $new_cats, function ($value) {
        $value = trim($value);

        return $value != '' && $value != '&nbsp;';
    }
);

Final code is:

if(Input::get('addcategorie')) {
    $new_cats = array();
    foreach(explode(',', Input::get('addcategorie')) as $categorie) {
        $categorie = Categorie::firstOrCreate(array('name' => $categorie));

        array_push($new_cats, $categorie->id);
    }

    $new_cats = array_filter(
        $new_cats, function ($value) {
            $value = trim($value);

            return $value != '' && $value != '&nbsp;';
        }
    );

    $workshop->categories()->attach($new_cats);
}

edited Jul 4, 2014 at 13:38

answered Jul 4, 2014 at 13:22

Zemistr

1,0497 silver badges10 bronze badges

1 Comment

Jeroen Over a year ago

tried both, still same result. Could it be that the 'problem' is at 'firstOrCreate' ?

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