PHP How to foreach explode POST multiple values

I want to foreach explode from POST multiple values

Cut off "1234" with first space (by character not position)

I get error "Array to string conversion"

Form

<input type="checkbox" name="docid[]" value="1234 harry potter">

Submit

$docID = $_POST['docid'];
foreach($docID as $val) {
    echo explode(' ', $val);
}

Output

1234

EDIT
I want to insert output to DB

>Solution :

explode returns an array of strings, so echo won’t work. It also has a third parameter, use that to limit the elements returned:

<?php 
$docID = $_POST['docid'];
foreach($docID as $val) {
    $exploded = explode(' ', $val, 2);
    // print_r($exploded); # Array ( [0] => 1234 [1] => harry potter )
    echo $exploded[0];
}

will output 1234

Edit: if you want to cut off 1234 from your result use echo $exploded[1]; – this will output harry potter