PHP - 如何将数组推入特定位置？

Question

I hope I can explain my problem

I have on array(10x10) filled with 1 and 0 e.g.

0000000000
0000000000
0000000000
0000000000
0000000000
0000000000
0000111100
0000000000
1111000000
0000000000

Now I'd like to push another array

e.g.

11111
11111

into it on a specific position point (3,3)
I've highlighted the position in bold

0000000000
0000000000
0011111000
0011111000
0000000000
0000000000
0000111100
0000000000
1111000000
0000000000

Futhermore, if there is already a value on the field add it, so if I repeat the process the matrix will become this.

0000000000
0000000000
0022222000
0022222000
0000000000
0000000000
0000111100
0000000000
1111000000
0000000000

I hope someone can point me in the right direction. I've already played with some array functions, but I can't get it to work.

What do you suggest?

Answer 1

Something along these lines should do it:

/**
 * Push a small matrix into a larger matrix.
 * Note: no size restrictions are applied, if $push
 * exceeds the size of $matrix or the coordinates are
 * too large you'll get a jaggy array.
 *
 * @param array $matrix A 2D array of ints.
 * @param array $push   A 2D array <= $matrix to push in.
 * @param int   $x      The starting x coordinate.
 * @param int   $y      The starting y coordinate.
 * @return array The modified $matrix.
 */
function matrix_push(array $matrix, array $push, $x, $y) {
    list($i, $j) = array($x, $y);

    foreach ($push as $row) {
        foreach ($row as $int) {
            $matrix[$i][$j++] += $int;
        }
        $i++;
        $j = $y;
    }

    return $matrix;
}