两个数组合并解决方案

两个数组合并
不太会描述，我举个例吧

array1
array1[0] = '1';
array1[1] = '2';

array2
array2[0] = '3';
array2[1] = '4';

想组合成

array[0]['arr1'] = '1'
array[0]['arr2'] = '3'

array[1]['arr1'] = '1'
array[1]['arr2'] = '4'

array[2]['arr1'] = '2'
array[2]['arr2'] = '3'

array[3]['arr1'] = '2'
array[3]['arr2'] = '4'
------解决思路----------------------
这是在求 笛卡尔积
------解决思路----------------------
用递归实现的，但是只能是两个数组，感觉这种方法有点笨

$arr1=array(1,2);
$arr2=array(3,4);

$res = test($arr1,$arr2,0,0);

echo "
";
print_r($res);
echo "
";

function test($arr1,$arr2,$index1=0,$index2=0) {
	static $result = array();
	$tmp[]=$arr1[$index1];
	$tmp[]=$arr2[$index2];
	$result [] = $tmp;

	if(($index1==count($arr1)-1) && ($index2==count($arr2)-1)){
		return $result;
	}else{
		if($index2==count($arr2)-1){
			$index1++;
			$index2 = 0;
		}else{
			$index2++;
		}
		return test($arr1,$arr2,$index1,$index2);
	}
}
/*
Array
(
    [0] => Array
        (
            [0] => 1
            [1] => 3
        )

    [1] => Array
        (
            [0] => 1
            [1] => 4
        )

    [2] => Array
        (
            [0] => 2
            [1] => 3
        )

    [3] => Array
        (
            [0] => 2
            [1] => 4
        )

)
*/

------解决思路----------------------

$arr1 = array(1,2);
$arr2 = array(3,4);
$arr = array();

for($i=0,$max1=count($arr1); $i<$max1; $i++){
    for($j=0,$max2=count($arr2); $j<$max2; $j++){
        $tmp = array();
        $tmp['arr1'] = $arr1[$i];
        $tmp['arr2'] = $arr2[$j];
        $arr[] = $tmp;
    }
}

print_r($arr);