当一个比第二个大两倍时，预先取两个数组

Question

Ok so I have two arrays, and the second one is allways twice larger than first one:

$items1 = array('1', '2', '3');
$items2 = array('a', 'b', 'c', 'd', 'e', 'f');

I know that i can foreach two arrays with same items count like this:

foreach ($items1 as $key => $item1)
{
echo $item1 . $items2[$key] . ', ';
}

This will give result like this: 1a, 2b, 3c.... But how to foreach thos two arrays to get result like this: 1ab, 2cd, 3ef? aka echo first item from $items1 array, an then two from $items2.

Answer 1

You could write:

foreach ($items1 as $i => $item1)
{
    echo $item1 . $items2[$i * 2] . $items2[$i * 2 + 1] . ', ';
}