How to remove spaces in array keys names in php?

Question

I am trying to remove all spaces in array keys names i.e. str_replace(' ','',$value) (or worst cast scenario replace them with underscores (_) )

and I am trying to do this at the deepest level (shown below) of my multidimensional array (because other layers/levels don't have spaces (THANK GOD!))

[...]

[ownPagestoriesbystorytype] => Array
                        (
                            [type] => pagestoriesbystorytype
                            [object_id] => 12365478954
                            [metric] => page_stories_by_story_type
                            [end_time] => 1386057600
                            [period] => 86400
                            [ownValues] => Array
                                (
                                    [type] => pagestoriesbystorytypemetrics
                                    [fan] => 1913
                                    [page post] => 153
                                    [user post] => 24
                                )

                        )

                    [ownPagestorytellersbystorytype] => Array
                        (
                            [type] => pagestorytellersbystorytype
                            [object_id] => 12365478954
                            [metric] => page_storytellers_by_story_type
                            [end_time] => 1386057600
                            [period] => 86400
                            [ownValues] => Array
                                (
                                    [type] => pagestorytellersbystorytypemetrics
                                    [fan] => 1902
                                    [page post] => 137
                                    [user post] => 9
                                )

                        )

[...]

So far my attempts have been fruitless :

[...]
if (is_array($value))
        {

            $keys = str_replace(' ','',array_keys($value));
            $values = array_values($value);
            $value = array_combine($keys,$values);
        }
[...]


[...]

foreach ($value as $k => $v)
            {
                $b = str_replace(' ','',$k);
                $value[$b] = $value[$k];
                unset ($value[$k]);

            }

[...]

The codes above do not work, however if I put print_r($value); at the end of the loop you can clearly see that spaces are being removed, just somehow the end result ends up being with spaces (STILL).

The whole loop looks like this:

for ($i=0;$i<count($results);$i++)
{

    for ($j=0;$j<count($results[$i]);$j++)
    {
    foreach($results[$i][$j] as $key => $value)
    {
        $typee = ['type' => strtolower(str_replace('_','',$results[$i][$j]['metric']))];
        array_insert($results[$i][$j],$typee,0);
        if (is_array($value))
        {

            $keys = str_replace(' ','',array_keys($value));
            $values = array_values($value);
            $value = array_combine($keys,$values);

            $type = ['type' => strtolower(str_replace('_','',$results[$i][$j]['metric']))."metrics"];
            array_insert($results[$i][$j]['value'],$type,0);
            $results[$i][$j]['ownValues'] = $results[$i][$j][$key];
            unset($results[$i][$j][$key]);


        }
    }
    }
}

And you can see how the whole array looks like here:

How to prepend array to each element of another array with my choice of key and value (in php)?

Any suggestions? :)

Richard Turner · Accepted Answer · 2014-11-20 13:31:50Z

9

This will help:

function fixArrayKey(&$arr)
{
    $arr = array_combine(
        array_map(
            function ($str) {
                return str_replace(" ", "_", $str);
            },
            array_keys($arr)
        ),
        array_values($arr)
    );

    foreach ($arr as $key => $val) {
        if (is_array($val)) {
            fixArrayKey($arr[$key]);
        }
    }
}

Tested as below:

$data = array (
    "key 1" => "abc",
    "key 2" => array ("sub 1" => "abc", "sub 2" => "def"),
    "key 3" => "ghi"
);
print_r($data);
fixArrayKey($data);
print_r($data);

Input:

Array
(
    [key 1] => abc
    [key 2] => Array
        (
            [sub 1] => abc
            [sub 2] => def
        )

    [key 3] => ghi
)

Output:

Array
(
    [key_1] => abc
    [key_2] => Array
        (
            [sub_1] => abc
            [sub_2] => def
        )

    [key_3] => ghi
)

edited Nov 20, 2014 at 13:31

Richard Turner

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answered Dec 13, 2013 at 9:51

sergio

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4 Comments

codepreneur Over a year ago

Hey, would you also know how to remove all special characters like "á", "ü" etc. If I add them like this, it doesnt work :((( => function fixArrayKey(&$arr) { $arr=array_combine(array_map(function($str){return str_replace(array(" ",",",".","-","+","á","я", "Я"),"",$str);},array_keys($arr)),array_values($arr)); foreach($arr as $key=>$val) { if(is_array($val)) fixArrayKey($arr[$key]); } }

codepreneur Over a year ago

I mean all of these [",",",".","-","+"] work perfectly fine and are being replaced, its just special characters (foreign) are not working.. would you know why?

sergio Over a year ago

Look here, hope it will help: stackoverflow.com/questions/4389297/replace-foreign-characters

Amir Khan Over a year ago

great it work with every kind of array

sMyles · Accepted Answer · 2018-04-19 13:55:03Z

6

You can pass an array to str_replace so it's much cleaner and easier to just do this:

$my_array = array( 'one 1' => '1', 'two 2' => '2' );
$keys = str_replace( ' ', '', array_keys( $my_array ) );
$results = array_combine( $keys, array_values( $my_array ) );

Result:

array(2) {
  ["one1"]=>
  string(1) "1"
  ["two2"]=>
  string(1) "2"
}

Example: https://glot.io/snippets/ejej1chzg3

edited Apr 19, 2018 at 13:55

answered Oct 16, 2016 at 0:52

sMyles

2,7343 gold badges36 silver badges48 bronze badges

3 Comments

sMyles Over a year ago

What do you mean? You want to exclude removing spaces on custom defined keys, but replace them on all others?

Lim Socheat Over a year ago

Yes, you are write. just exclude some specific key name that we want to exclude in special condition.

insign Over a year ago

@LimSocheat unset first?

Benjamin de Bos · Accepted Answer · 2013-12-13 09:53:57Z

1

function array_stripstuff(&$elem)
{
  if (is_array($elem)) {
    foreach ($elem as $key=>$value)
      $elem[str_replace(" ","-",$key)]=$value;
  }
  return $elem;
}

$strippedarray = array_walk_recursive($yourarray,'array_stripstuff');

There you go :-)

answered Dec 13, 2013 at 9:53

Benjamin de Bos

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