artoodetoo · January 21, 2018 11:46
diff --git a/result.txt b/result.txt
 C:\>php flatten.php
 array(4) {
  [0]=>
  int(11)
  [1]=>
  int(12)
  [2]=>
  int(13)
  [3]=>
  int(14)
 }
 array(3) {
  [0]=>
  int(21)
  [1]=>
  int(23)
  [2]=>
  int(24)
 }
 array(4) {
  ["a"]=>
  int(31)
  ["b"]=>
  int(32)
  ["c"]=>
  int(33)
  ["d"]=>
  int(34)
 }
 array(4) {
  ["a"]=>
  int(41)
  ["b"]=>
  int(42)
  ["c"]=>
  int(43)
  ["d"]=>
  int(44)
 }
diff --git a/test.php b/test.php
 <?php

 function array_flatten(array $array = null) 
 {
    $result = [];
    if ($array) {
        foreach ($array as $key => $value) {
            $result += is_array($value) 
                ? array_flatten($value) 
                : [$key => $value];
        }
    }
    return $result;
 }

 var_dump(array_flatten(
    [11, 12, 13, 14]
 ));

 var_dump(array_flatten(
    [
        [21, 
            [22, 23], 
        24]
    ]
 ));

 var_dump(array_flatten(
    [
        'a' => 31, 
        ['b' => 32, 'c' => 33], 
        'd' => 34
    ]
 ));

 var_dump(array_flatten(
    [
        'a' => 41, 
        [
            'b' => 42, 
            ['c' => 43], 
            'd' => 44
        ]
    ]
 ));
	<?php

	function array_flatten(array $array = null)
	{
	$result = [];
	if ($array) {
	foreach ($array as $key => $value) {
	$result += is_array($value)
	? array_flatten($value)
	: [$key => $value];
	}
	}
	return $result;
	}

	var_dump(array_flatten(
	[11, 12, 13, 14]
	));

	var_dump(array_flatten(
	[
	[21,
	[22, 23],
	24]
	]
	));

	var_dump(array_flatten(
	[
	'a' => 31,
	['b' => 32, 'c' => 33],
	'd' => 34
	]
	));

	var_dump(array_flatten(
	[
	'a' => 41,
	[
	'b' => 42,
	['c' => 43],
	'd' => 44
	]
	]
	));