PHP数组多维关联

$_REQUEST = array(
    'articolo' => array(
        1 => 1,
        3 => 'Sostituzione sostituzioni',
        4 => 'Cambio olio'
    ),
    'specifica' => array(
        1 => 2,
        3 => 'Camoin',
        4 => 'Furgone'
    ),
    'quantita' => array(
        1 => 3,
        3 => 5,
        4 => 7
    )
);

i need to insert on database like this

$_REQUEST['articolo'][1]
$_REQUEST['specifica'][1]
$_REQUEST['quantita'][1]

on database row and

$_REQUEST['articolo'][3]
$_REQUEST['specifica'][3]
$_REQUEST['quantita'][3]

on another row and ...

$_REQUEST['articolo'][4]
$_REQUEST['specifica'][4]
$_REQUEST['quantita'][4]

i just want to know how to make another array row by row

i need to print

1 -> $_REQUEST['articolo'][1]
2 -> $_REQUEST['specifica'][1]
3 -> $_REQUEST['quantita'][1]

Sostituzione sostituzioni -> $_REQUEST['articolo'][3]
Camoin -> $_REQUEST['specifica'][3]
5 -> $_REQUEST['quantita'][3]

Cambio olio -> $_REQUEST['articolo'][4]
Furgone -> $_REQUEST['specifica'][4]
7 -> $_REQUEST['quantita'][4]

thank

you need something like this:

foreach ($request as $key => $value)
{
    $request[$key][1]   //row1
    $request[$key][3]   //row2
    $request[$key][4]   //row3
}  

Edit Based on the comments:
if the array is dynamic(you do not know the keys of the sub-array), you can do this instead:

foreach ($request as $key => $value)
{
    foreach ($request[$key] as $key2 => $value2)
    {
       $request[$key][$key2] //here are your values
    }
} 

Now you have an idea on how to do it right? use those values inside that foreach to add data to your database

$name = array_keys($_REQUEST);
$index = array_keys($_REQUEST['articolo']);

for($i=0; $i < count($index); $i++):
    if($i + 1 % count($index)):
        for($j=0; $j < count($name); $j++):
            echo $name[$j].': '.$_REQUEST[$name[$j]][$index[$i]].'<br>'."
";
        endfor;
        echo '<hr>';
    endif;
endfor;

output it's right now

articolo: 1 specifica: 2 quantita: 3

articolo: Sostituzione sotituzioni specifica: Camoin quantita: 5

articolo: Cambio olio specifica: Furgone quantita: 7

now just need to insert the ordinate data on database