合并数组值，交替

Question

I'm trying to merge arrays but would like to alternate the order.

$combined = array_merge($vars,$mods);

gives me: one,two,three,1,2,3...

I'd like: one,1,two,2,three,3...

is there a way to do this?

Answer 1

You can use a for loop and refer to the index of each of the arrays you're combining.

$l = count($vars);
for ($i=0; $i < $l; $i++) {
    $combined[] = $vars[$i];
    $combined[] = $mods[$i];
}

In each iteration of the loop, you'll append one item from each of the original arrays. This will achieve the alternating effect.

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As Steve pointed out, this can be done more simply using foreach:

foreach ($vars as $i => $value) {
    $combined[] = $value;
    $combined[] = $mods[$i];
}