This question already has answers here:
Is there a function to extract a 'column' from an array in PHP?
(15 answers)
Closed 5 months ago.
I have below array with multi dimensional array. How I can convert it into one dimensional array.
Array
(
[0] => Array
(
[id] => 21134
)
[1] => Array
(
[id] => 21135
)
[2] => Array
(
[id] => 21137
)
[3] => Array
(
[id] => 21138
)
[4] => Array
(
[id] => 21144
)
[5] => Array
(
[id] => 21147
)
[6] => Array
(
[id] => 21149
)
[7] => Array
(
[id] => 21150
)
[8] => Array
(
[id] => 21151
)
[9] => Array
(
[id] => 21152
)
[10] => Array
(
[id] => 21153
)
)
This case array_column() is very useful:
$resultArray = array_column($yourArray,'id');
If will give you the values of all the id's in a one-dimensional array.
See: http://php.net/manual/en/function.array-column.php
use array_column()
eg:
$array = Array
(
[0] => Array
(
[id] => 21134
)
[1] => Array
(
[id] => 21135
)
[2] => Array
(
[id] => 21137
)
[3] => Array
(
[id] => 21138
)
[4] => Array
(
[id] => 21144
)
[5] => Array
(
[id] => 21147
)
[6] => Array
(
[id] => 21149
)
[7] => Array
(
[id] => 21150
)
[8] => Array
(
[id] => 21151
)
[9] => Array
(
[id] => 21152
)
[10] => Array
(
[id] => 21153
)
)
use array_column() to convert it, like this,
$result = array_column($array,'id');
You can use array_map for multidimensional array into one-dimensional array
$oneDimensionalArray = array_map('current', $twoDimensionalArray);
you can also array_merge
$oneDimensionalArray = call_user_func_array('array_merge', $twoDimensionalArray);
Related
This question already has answers here:
How to Flatten a Multidimensional Array?
(31 answers)
Closed 7 months ago.
There are many references on S/O showing various methods to flatten a multidimensional recursive array (with more than two levels). I have been through dozens (and tried most) but I'm still running into an odd problem with every one I've tried. What I am getting as a result is:
Array
(
)
Array
(
)
Array
(
)
Array
(
[0] => 1000043
[1] => 1000045
[2] => 1000050
)
Array
(
)
Array
(
)
Array
(
)
Array
(
)
Array
(
[0] => 1000030
[1] => 1000032
[2] => 1000058
[3] => 1000064
) ...
But what I'm expecting is a truly flattened single array:
Array
[0] => 1000043
[1] => 1000045
[2] => 1000050
[3] => 1000030
[4] => 1000032
[5] => 1000058
[6] => 1000064
)
The method I found on S/O is supposed to handle an "empty array" (which I assume is the problem) but I'm still getting the wrong output. Here is my code:
function array_flatten5(array $array)
{
$flat = array(); // initialize return array
$stack = array_values($array); // initialize stack
while($stack) // process stack until done
{
$value = array_shift($stack);
if (is_array($value)) // a value to further process
{
$stack = array_merge(array_values($value), $stack);
}
else // a value to take
{
$flat[] = $value;
}
}
return $flat;
}
Could someone point out what I missing here because I'm thinking it's something simple but at this point my eyes are crossed with the number of attempts I've made. Thank you for any help you can provide.
Here is the original array. It is 4-deep:
Array ( [0] => 1000043 [1] => 1000045 [2] => 1000050 ) Array ( [0] => 1000030 [1] => 1000032 [2] => 1000058 [3] => 1000064 ) Array ( [0] => 1000041 [1] => 1000059 [2] => 1000069 ) Array ( [0] => 1000021 [1] => 1000044 [2] => 1000049 [3] => 1000071 ) Array ( [0] => 1000009 [1] => 1000013 [2] => 1000015 [3] => 1000017 [4] => 1000053 ) Array ( [0] => 1000022 [1] => 1000034 [2] => 1000070 ) Array ( [0] => 1000038 [1] => 1000047 [2] => 1000055 [3] => 1000063 ) Array ( [0] => 1000019 [1] => 1000054 [2] => 1000060 [3] => 1000066 [4] => 1000068 ) Array ( [0] => 1000006 [1] => 1000014 [2] => 1000016 [3] => 1000072 ) Array ( [0] => 1000024 [1] => 1000025 [2] => 1000046 [3] => 1000061 [4] => 1000067 ) Array ( [0] => 1000028 [1] => 1000039 [2] => 1000048 ) Array ( [0] => 1000042 [1] => 1000057 ) Array ( [0] => 1000027 [1] => 1000033 [2] => 1000036 [3] => 1000037 ) Array ( [0] => 1000008 [1] => 1000010 [2] => 1000012 [3] => 1000018 ) Array ( [0] => 1000026 [1] => 1000062 [2] => 1000065 ) Array ( [0] => 1000020 [1] => 1000023 [2] => 1000031 [3] => 1000035 [4] => 1000040 ) Array ( [0] => 1000007 [1] => 1000011 [2] => 1000029 ) Array ( [0] => 1000051 [1] => 1000052 [2] => 1000056 ) Array ( [0] => 1000001 [1] => 1000002 [2] => 1000003 [3] => 1000004 [4] => 1000005 ) Array ( [0] => 1000073 )
And here is the outcome using the array_walk_recursive suggestion ...
Array
(
)
Array
(
)
Array
(
)
Array
(
)
Array
(
)
Array
(
[0] => 1000111
[1] => 1000113
[2] => 1000129
[3] => 1000134
)
Array
(
)
Array
(
)
Array
(
[0] => 1000012
[1] => 1000085
)
Array
(
) ...
You didn't prepare suitable array, but looking on this code you need probably just array_walk_recursive() function.
$array = [
[1, 2, 3, 4],
[[5, 6], [7, 8]],
[[[9], [10]], [11]]
];
$result = [];
array_walk_recursive($array, function ($tempV) use (&$result) {
$result[] = $tempV;
});
print_r($result);
Output:
Array
(
[0] => 1
[1] => 2
[2] => 3
[3] => 4
[4] => 5
[5] => 6
[6] => 7
[7] => 8
[8] => 9
[9] => 10
[10] => 11
)
I have this array of userids. I want to combine the child userid arrays into one array within the parent arrays.
[0] => Array
(
[0] => Array
(
[userid] => 1610
)
[1] => Array
(
[userid] => 1614
)
[2] => Array
(
[userid] => 1616
)
)
[1] => Array
(
[0] => Array
(
[userid] => 1610
)
[1] => Array
(
[userid] => 1614
)
[2] => Array
(
[userid] => 1616
)
[3] => Array
(
[userid] => 1618
)
)
My desired result would look like...
[0] => Array
(
[userids] => Array
(
[0] => 1610
[1] => 1614
[2] => 1616
)
)
[1] => Array
(
[userids] => Array
(
[0] => 1610
[1] => 1614
[2] => 1616
[3] => 1618
)
)
Loop the array and use array_column to flatten the subarrays.
foreach($arr as $sub){
$res[][key($sub[0]) . "s"] = array_column($sub, 'userid');
}
var_dump($res);
https://3v4l.org/A68VA
I have two arrays and I want to combine them together
1) first look like this:
[11] => Array
(
[id] => 11
[name] => test
)
[12] => Array
(
[id] => 12
[name] => test1
)
2) second array look like this:
[0] => Array
(
[offer_id] => 11
[countries] => Array
(
[SA] => Array
(
[id] => 682
)
)
)
[1] => Array
(
[offer_id] => 12
[countries] => Array
(
[KW] => Array
(
[id] => 414
)
)
)
I want this result. How is it possible can any one provide solution for same?
[11] => Array
(
[id] => 11
[name] => test
[countries] => Array
(
[SA] => Array
(
[id] => 682
)
)
)
[12] => Array
(
[id] => 12
[name] => test
[countries] => Array
(
[KW] => Array
(
[id] => 414
)
)
)
Thank you for the help!
Try this:
foreach ($array1 as &$arr1) {
$offer_id = $arr1['id']; // Search for this offer_id in array 2
$match = array_filter($array2, function($v) use ($offer_id){
return $v['offer_id'] == $offer_id; // Return matching offer id
});
$arr1['countries'] = current($match)['countries']; // Assign matched country to array
}
I have an multidimensional array but need to make it smaller.
This is an easy question I believe. I need to remove 1 array in
jsonresult array, the first one but preserve the other in the next array. I have tried array_splice but it only keeps one.
Array
(
[searchword] => search word
[jsonresult] => Array
(
[0] => Array // THIS ONE, KEEP ITS CHILDREN MOVE UP
(
[0] => Array
(
[id] => 14889770
)
[1] => Array
(
[id] => 14389720
)
[2] => Array
(
[id] => 14869723
)
)
[1] => Array // THIS ONE, KEEP ITS CHILDREN MOVE UP
(
[0] => Array
(
[id] => 14889722
)
[1] => Array
(
[id] => 14389711
)
[2] => Array
(
[id] => 14869329
)
)
)
)
Would like to get:
Array
(
[searchword] => search word
[jsonresult] => Array
(
[0] => Array
(
[id] => 14889770
)
[1] => Array
(
[id] => 14389720
)
[2] => Array
(
[id] => 14869723
)
[3] => Array
(
[id] => 14889722
)
[4] => Array
(
[id] => 14389711
)
[5] => Array
(
[id] => 14869329
)
)
)
Try this code. This may not be the correct method but it gives what you need. (As I understand from your question)
//creating a sample array similar to one you given in question.
$arr_test['searchword'] = 'search word';
$arr_test['jsonresult'] = array(array(array('id'=>14889770),array('id'=>14889720)),array(array('id'=>14889780),array('id'=>14889790)));
//creating new array
$arr_new = array();
//formatting array as you needed it
foreach($arr_test['jsonresult'] as $arr_jsonresult){
foreach($arr_jsonresult as $jsonresult){
$arr_new['jsonresult'][] = $jsonresult;
}
}
//overwriting the specific array key
$arr_test['jsonresult'] = $arr_new['jsonresult'];
//checking output
echo '<pre>';
print_r($arr_test);
This code produces the following output
Array
(
[searchword] => search word
[jsonresult] => Array
(
[0] => Array
(
[id] => 14889770
)
[1] => Array
(
[id] => 14889720
)
[2] => Array
(
[id] => 14889780
)
[3] => Array
(
[id] => 14889790
)
)
)
i have big problem, because i don't know how get values from this array where value is be key into new array. This is my source array
Array
(
[0] => Array
(
[ID] => 250602
[NAME] => qwe
)
[1] => Array
(
[ID] => 250603
[NAME] => wer
)
[2] => Array
(
[ID] => 250629
[NAME] => sdf
)
[3] => Array
(
[ID] => 250629
[NAME] => xcv
)
[4] => Array
(
[ID] => 250629
[NAME] => fghfgh
)
[5] => Array
(
[ID] => 250601
[NAME] => pggd
)
[6] => Array
(
[ID] => 250601
[NAME] => dfgdfg
)
[7] => Array
(
[ID] => 250606
[NAME] => dfgdfg
)
)
When id is the same it will be created a new table that will look like for id = 250629
[NAME] => Array
(
[0] => sdf
[1] => xcv
[2] => fghfgh
)
How about foreach loop like this?
<?php
$final_array=array();
foreach($arrays as $sub_arr){ //it will traverse loop for all sub-arrays
$final_array[$sub_arr['ID']][]=$sub_arr['NAME'];
}
print_r($final_array); //you should see expected output.
?>
It will product below output for your given data:
Array
(
[250602] => Array
(
[0] => qwe
)
[250603] => Array
(
[0] => wer
)
[250629] => Array
(
[0] => sdf
[1] => xcv
[2] => fghfgh
)
[250601] => Array
(
[0] => pggd
[1] => dfgdfg
)
[250606] => Array
(
[0] => dfgdfg
)
)
Working Demo
Like this
$by_name = array();
foreach($your_array as $item)
$by_name[$item['ID']] []= $item['name'];
This makes use of php's lazy array initialization ([]= creates a new array implicitly).
If you get your array from mysql, you might also consider GROUP_CONCAT.