在随机位置合并2个数组

Question

How would someone merge 2 arrays where $_array_1 is scattered but $_array_2 maintains its original order globally?

I have 2 arrays

$_array_1 = array( a, b, c );

$_array_2 = array( 1, 2, 3, 4, 5, 6 );

$_merged_array = array( c, 1, a, 2, 3, 4, 5, b, 6 );

I know this must be possible but don't have a clue where to start. What is the most efficient method and cleanest?

Answer 1

My interpretation of your post is: Insert every value of array 1 on a random position in array 2. This can be achieved with the following code:

$_array_1 = array( 290, 188, 519 );

$_array_2 = array( 213, 702, 231, 173, 632, 711 );

foreach($_array_1 as $val) {
    array_splice($_array_2, rand(0, count($_array_2)), 0, $val);
}

print_r($_array_2); // For example: Array ( [0] => 519 [1] => 213 [2] => 290 [3] => 702 [4] => 231 [5] => 173 [6] => 632 [7] => 188 [8] => 711 )