2d multidimensional array to 1d array in php

Question

Just wondering if anyone has transformed a 2 dim array to a one dim array in php. I\'ve yet to come across a clear explanation in php. Any suggestion would be appreciated.

Answer 1

The solution for rectangular 2D array is simple indeed, but I had a problem. My 2D-array consisted of 1D arrays of different lengths :

$myArray = [
    [1, 2, 3, 4],
    [5, 6, 7],
    [8, 9]
];

I came up with more generalized solution to turn any 2D array into 1D:

function array2DTo1D($arr2D) {
    $i = 0; $j = 0;
    $arr1D = [];
    while (isset($arr2D[$i][0])) {
        while (isset($arr2D[$i][$j])) {
            $arr1D[] = $arr2D[$i][$j];
            $j++;
        }
        $i++; $j = 0;
    }
    return $arr1D;
}