Extract value from array structure

Question

Here is my array structure:

array (
 'ALCAR STAHLRAD' => 
 array (
 'diametru' => 
 array (
 0 => 15,
 6 => 16,
 9 => 14,
 14 => 13,
 20 => 17,
 468 => 20,
 ),
...........

I was doing that code:

$diametru = '';
foreach ($items as $key => $val){
 $diametru .= "<option>$key[array]['diametru']=>$val</option>";
}
print_r($diametru);

I was expecting to add into my "option" the "diametru" value

<option>15</option>
<option>16</option>
<option>14</option>
..............

but the output is:

A['diametru']=>ArrayE['diametru']=>ArrayD['diametru']=>ArrayD['diametru']... Thank you in advance for any idea :)

• law_81: you have to use a nested foreach to get desired result
• Gafwebmaster: It working just one foreach, I just need key of key value, then again key of key value, but I don't know how to extract that values
• Gafwebmaster: I was trying also: $diametru .= "<option>[$key][$key]=>$val</option>"; but still not extracting the value I need.

Answer 1

Edit : If you want to add array_unique and SORT_NUMERIC then see my edited code.

You can do it through array_column and array_walk_recursive if you don't want to use foreach.

$arr = array ( 'ALCAR STAHLRAD' => array ( 'diametru' => array ( 0 => 15, 6 => 16, 7 => 16, 9 => 14, 14 => 13, 20 => 17, 468 => 20, ), ));
$option_arr = array_column($arr,'diametru');
function generate_option($item, $key)
{
 echo "<option>" . $key . " : ". $item . "</option>";
}
$options = array_unique($option_arr[0]); // You can add array_unique and SORT_NUMERIC here
asort($options); // If you want sort by key then you need to use asort. Because array_unique remove duplicate from array but doesn't sort actually.
echo "<select>";
array_walk_recursive($options, 'generate_option');
echo "</select>";

• Gafwebmaster: Do you have any ideea on your sample where to add "array_unique" and "SORT_NUMERIC"
• Gafwebmaster: Thank you again! The "array_unique" works fine but "SORT_NUMERIC" not :(
• Gafwebmaster: I am using just "<option>" . $item . "</option>", maybe you sorted the $key values
• Hardik Solanki: @Gafwebmaster Do you want sort by key or sort by value?
• Gafwebmaster: I would like to sort by value

Answer 2

Get your 1st element first:

$alcar = $items[0]; // ALCAR STAHLRAD
// or
$alcar = $items['ALCAR STAHLRAD'];

Then get diameters array:

$diameters = $alcar['diametru'];

And only then you can do your loop:

diametru = '';
foreach ($diameters as $key => $val){
 $diametru .= '<option>'.$key.'=>'.$val.'</option>';
}
print_r($diametru);

• Gafwebmaster: The elements name comes dynamic, I don't know the name; it could be also one element or more, I can't go one by one to take and iterate for each.