Get key from array with multiple values

Question

So i need to return the number (6, 8 or 10) with the country value. So in the example, with 'sweden' its supposed to return 8 but the key of the array is apparently just Array(). Is the wrong in the structure of my array or the usage of array_keys?

$list= array (
  'list' => 
  array (
    6 => 
    array (
        'default',
        'finland'
    ),
    8 => 
    array (
        'sweden',
        'norway'
    ),
    10 => 
    array (
        'germany',
        'belgia'
    ),
  ),
);
print_r(array_keys($list, "sweden"));

return: Array()

Possible duplicate of PHP Multidimensional Array Searching (Find key by specific value) — René Höhle
– René Höhle, Commented Jan 1, 2019 at 1:26
What? use the accepted Answer that is working ;) arrray_keys isn't working with multidimensional arrays very well. — René Höhle
– René Höhle, Commented Jan 1, 2019 at 1:29
in that question its an associative array and is looking for 'slug' with slugs value, this is different — 40oz
– 40oz, Commented Jan 1, 2019 at 1:32

Barmar · Accepted Answer · 2019-01-01 01:41:50Z

3

You have two problems.

First, the array you want to search is $list['list'], not $list itself.

Second, the second argument to array_keys() is only useful for 1-dimensional arrays. You have a 2-dimensional array, but array_keys() will not automatically search inside the nested arrays. So you need to write your own loop or use array_filter().

$results = array();
foreach ($list['list'] as $key => $value) {
    if (array_search('sweden', $value) !== false) {
        $results[] = $key;
    }
}
print_r($results);

edited Jan 1, 2019 at 1:41

answered Jan 1, 2019 at 1:34

Barmar

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2 Comments

40oz Over a year ago

im getting a Parse error: syntax error, unexpected 'as' , do i need to edit something?

Nick Over a year ago

Should be foreach, not for

PHP Geek · Accepted Answer · 2019-01-01 05:20:50Z

0

use foreach for it.

foreach ($list as $key => $value){

}

answered Jan 1, 2019 at 5:20

PHP Geek

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Comments

Khagesh · Accepted Answer · 2019-01-01 06:21:58Z

0

I think this is what you want

foreach($list as $key => $value ){  
        $arr = array_keys($value);//this has your (6, 8 or 10)         
        foreach($arr as $val){
             print_r($value[$val]);//showing array data of 6,8,10 indexes
        }  
    }

output:

answered Jan 1, 2019 at 6:21

Khagesh

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