How to Flatten a Multidimensional Array?
arrays, flatten, multidimensional-array, php
Solution
You can use the Standard PHP Library (SPL) to "hide" the recursion.
$a = array(1,2,array(3,4, array(5,6,7), 8), 9);
$it = new RecursiveIteratorIterator(new RecursiveArrayIterator($a));
foreach($it as $v) {
echo $v, " ";
}
prints
1 2 3 4 5 6 7 8 9
Problem
Is it possible, in PHP, to flatten a (bi/multi)dimensional array without using recursion or references? I'm only interested in the values so the keys can be ignored, I'm thinking in the lines of `array_map()` and `array_values()`.