Goals
Turn PHP multi-dimensional array into one dimensional array (Flatten).
Solution
We will use Standard PHP Library (SPL) to tackle the problem. Assume we have an array like below.
$origin = [
'Level 1',
'_2_' => [
'Level 2',
'_3_' => [
'Level 3',
'_4_' => [
'Level 4',
'_5_' => [
'Level 5'
]
]
]
],
'Another Level 1',
'_2_1' => [
'Another Level 2'
]
];
Turn it into one dimensional array by using SPL RecursiveIteratorIterator and RecursiveArrayIterator class.
