Reduce Multidimensional Array Into One Array - php

Question

Simply to said I need help, how to make multidimension array into one array without change the key array?
From these :
Array
(
[0] => Array
(
[554] => a
)
[1] => Array
(
[561] => b
)
[2] => Array
(
[574] => c
)
)
Into these :
Array
(
[554] => a
[561] => b
[574] => c
)

Answer 1

I like to use array_walk_recursive for problems like this:
function flatten($array)
{
$temp=array();
array_walk_recursive($array, function($item, $key) use (&$temp) {
$temp[$key]=$item;
});
return $temp;
}
$a = array(
array(
564=>'a',
),
array(
561=>'b',
array(
562=>'d',
array(
563=>'e',
),
),
),
array(
574=>'c',
),
);
$b = flatten($a);
print_r($b);
This is my output:
Array
(
[564] => a
[561] => b
[562] => d
[563] => e
[574] => c
)

Answer 2

I'll just have to post this, since all the other current answers are so terrifically overcomplicated:
$result = array_reduce($array, function ($result, $array) { return $result + $array; }, array());
That's all that's needed.

Answer 3

i hope i can help you, first of all and do not take this wrong, you have got to investigate a little further, before asking for solutions, i strongly recommend you to go to www.php.net , http://php.net/manual/en/book.array.php and search for array documentation, enough said you are looking at ways to loop through array, actually you are looking for the "foreach" statement, here i have made a simple solution which you can convert into function later:
<?php
$original = array
(
0 => array(554 => 'a'),
1 => array(561 => 'b'),
2 => array(574 => 'c'),
);
/*$result = Array
(
[554] => a
[561] => b
[574] => c
);*/
$result = array();
foreach ($original as $sub_array) {
//this help us read first level array
foreach ($sub_array as $subArrayKey=>$subArray) {
// this help us read second level array
$result[$subArrayKey] = $subArray;
}
}
echo '<pre>';
print_r($result);
echo '</pre>';
?>

Answer 4

This should work for you:
$array = array(
array(554 => "a"),
array(561 => "b"),
array(574 => "c")
);
function getL2Keys($array) {
foreach($array as $sub)
$result[] = array_keys($sub);
return call_user_func_array('array_merge', array_values($result));
}
$array = array_combine(getL2Keys($array), call_user_func_array('array_merge', array_values($array)));
print_r($array);
Output:
Array
(
[554] => a
[561] => b
[574] => c
)