I have the following code:
Array
(
[0] => Array
(
[id] => '157a',
[name] => '***',
)
[1] => Array
(
[id] => '158a',
[name] => '***',
)
Need to copy the numeric keys (0, 1) for the array values ('157a', '158a'):
Array
(
[157a] => Array
(
[id] => '157a',
[name] => '***',
)
[158a] => etc
What is the most efficient way to achieve this?
Pass null as the second parameter to array_column() to get the entire sub-array and pass id as the third to index the array by the values of that column:
$array = array_column($array, null, 'id');
Dont know if its the efficient way, but i would do something like this:
$newArray = [];
foreach($array as $v)
{
$newArray[$v['id']] = $v;
}
You can use array_column for that:
array_column($input, $item, 'id');
Or you can use array_reduce to do that in a functional programming way.
$changedArray = array_reduce($input, function ($result, $item) {
$result[$item['id']] = $item;
return $result;
}, array());
var_dump($changedArray);
Related
This question already has answers here:
Filter multidimensional array by value in array [duplicate]
(2 answers)
Closed 3 years ago.
I have an array like this:
$array = (
[0] => stdClass Object
(
[ID] => 420
[name] => Mary
)
[1] => stdClass Object
(
[ID] => 10957
[name] => Blah
)
)
...
I found some solution to search using loop like this:
$item = null;
foreach($array as $struct) {
if ($v == $struct->ID) {
$item = $struct;
break;
}
}
Because of the large amount of data, I want to change it so that I can retrieve multiple values instead of one value at a time (ex: $array->420 = Mary, $array->10957 = Blah,...). Which way would be the most optimal in this case?
If you index your main array by the ID (use array_column() for this), and an array of the ID's you are after, then array_intersect_key() will extract all of the ones you want into a list of the matches...
$array =[
(Object)
[
"ID" => 420,
"name" => "Mary"
],
(Object)
[
"ID" => 10957,
"name" => "Blah"
]
];
$ids = [420, 10957];
$indexArray = array_column($array, null, "ID" );
$matches = array_intersect_key($indexArray, array_flip($ids));
print_r($matches);
gives..
(
[420] => stdClass Object
(
[ID] => 420
[name] => Mary
)
[10957] => stdClass Object
(
[ID] => 10957
[name] => Blah
)
)
You need to use array_flip() on the ID's array to convert the value into the key to work with the array_intersect_key() function.
You can then use array_values() if you don't want the key for this data (i.e. the ID)
Here's three possible solutions depending on your needs, using array_column:
Build an ID => name array:
$result = array_column($array, 'name', 'ID');
Build an ID => entry array (if you have more stuff than just the name):
$result = array_column($items, null, 'ID');
Alternative using array_reduce:
$result = array_reduce($array, static function ($result, $item) {
$result[$item['ID']] = $item;
return $result;
});
Demo: https://3v4l.org/fLMgL
This is the array:
Array
(
[0] => Array
(
[product_details] => {"5f93f983524def3dca464469d2cf9f3e":{"id":"110","qty":1,"option":"{\"color\":{\"title\":\"Color\",\"value\":null}}","price":1400,"name":"Foot Massage","tax":null,"image":"http:\/\/acme.dev\/uploads\/product_image\/product_110_1_thumb.jpg","coupon":"9","book_date_":"2017-04-19","book_date_name_":"wed","start_timeslot_":"09:00:00","end_timeslot_":"10:00:00","has_already_rescheduled":0,"discount_":"0","rowid":"5f93f983524def3dca464469d2cf9f3e","subtotal":1400}}
)
[1] => Array
(
[product_details] => {"2723d092b63885e0d7c260cc007e8b9d":{"id":"109","qty":1,"option":"{\"color\":{\"title\":\"Color\",\"value\":null}}","price":700,"name":"Body Massage","tax":0,"image":"http:\/\/acme.dev\/uploads\/product_image\/product_109_1_thumb.jpg","coupon":"","book_date_":"2017-04-18","book_date_name_":"tue","start_timeslot_":"09:00:00","end_timeslot_":"10:00:00","has_already_rescheduled":0,"discount_":"0","rowid":"2723d092b63885e0d7c260cc007e8b9d","subtotal":700}}
)
[2] => Array
(
[product_details] => {"a3c65c2974270fd093ee8a9bf8ae7d0b":{"id":"108","qty":1,"option":"{\"color\":{\"title\":\"Color\",\"value\":null}}","price":3000,"name":"Alo","tax":0,"image":"http:\/\/acme.dev\/uploads\/product_image\/default.jpg","coupon":"","book_date_":"2017-04-21","book_date_name_":"fri","start_timeslot_":"10:00:00","end_timeslot_":"12:00:00","has_already_rescheduled":0,"discount_":"0","rowid":"a3c65c2974270fd093ee8a9bf8ae7d0b","subtotal":3000}}
)
[3] => Array
(
[product_details] => {"a3c65c2974270fd093ee8a9bf8ae7d0b":{"id":"108","qty":1,"option":"{\"color\":{\"title\":\"Color\",\"value\":null}}","price":3000,"name":"Alo","tax":0,"image":"http:\/\/acme.dev\/uploads\/product_image\/default.jpg","coupon":"","book_date_":"2017-04-12","book_date_name_":"wed","start_timeslot_":"08:00:00","end_timeslot_":"10:00:00","has_already_rescheduled":0,"discount_":"0","rowid":"a3c65c2974270fd093ee8a9bf8ae7d0b","subtotal":3000}}
)
)
What I need is to create a new simple array containing the values from all the "id" elements.
Hope this simple foreach will be helpful for you.
Solution 1: Try this code snippet here
$result=array();
foreach($array as $value)
{
$array= json_decode($value["product_details"],true);
$result[]=$array[key($array)]["id"];
}
print_r($result);
Here we are using array_column to extract product_details then we are using to array_map to iterate over $personalDetails which contain all the JSON's then we are using to key function which will return first key of the array, and through that key we are accessing, its id.
Solution 2: Try this code snippet here
<?php
ini_set('display_errors', 1);
$array = Array
(
0 => Array
(
"product_details" => '{"5f93f983524def3dca464469d2cf9f3e":{"id":"110","qty":1,"option":"{\"color\":{\"title\":\"Color\",\"value\":null}}","price":1400,"name":"Foot Massage","tax":null,"image":"http:\/\/acme.dev\/uploads\/product_image\/product_110_1_thumb.jpg","coupon":"9","book_date_":"2017-04-19","book_date_name_":"wed","start_timeslot_":"09:00:00","end_timeslot_":"10:00:00","has_already_rescheduled":0,"discount_":"0","rowid":"5f93f983524def3dca464469d2cf9f3e","subtotal":1400}}'
),
1 => Array
(
"product_details" => '{"2723d092b63885e0d7c260cc007e8b9d":{"id":"109","qty":1,"option":"{\"color\":{\"title\":\"Color\",\"value\":null}}","price":700,"name":"Body Massage","tax":0,"image":"http:\/\/acme.dev\/uploads\/product_image\/product_109_1_thumb.jpg","coupon":"","book_date_":"2017-04-18","book_date_name_":"tue","start_timeslot_":"09:00:00","end_timeslot_":"10:00:00","has_already_rescheduled":0,"discount_":"0","rowid":"2723d092b63885e0d7c260cc007e8b9d","subtotal":700}}'
),
2 => Array
(
"product_details" => '{"a3c65c2974270fd093ee8a9bf8ae7d0b":{"id":"108","qty":1,"option":"{\"color\":{\"title\":\"Color\",\"value\":null}}","price":3000,"name":"Alo","tax":0,"image":"http:\/\/acme.dev\/uploads\/product_image\/default.jpg","coupon":"","book_date_":"2017-04-21","book_date_name_":"fri","start_timeslot_":"10:00:00","end_timeslot_":"12:00:00","has_already_rescheduled":0,"discount_":"0","rowid":"a3c65c2974270fd093ee8a9bf8ae7d0b","subtotal":3000}}'
),
3 => Array
(
"product_details" => '{"a3c65c2974270fd093ee8a9bf8ae7d0b":{"id":"108","qty":1,"option":"{\"color\":{\"title\":\"Color\",\"value\":null}}","price":3000,"name":"Alo","tax":0,"image":"http:\/\/acme.dev\/uploads\/product_image\/default.jpg","coupon":"","book_date_":"2017-04-12","book_date_name_":"wed","start_timeslot_":"08:00:00","end_timeslot_":"10:00:00","has_already_rescheduled":0,"discount_":"0","rowid":"a3c65c2974270fd093ee8a9bf8ae7d0b","subtotal":3000}}'
)
);
$personalDetails= array_column($array, "product_details");
$result=array_map(function($value){
$array=json_decode($value,true);
return $array[key($array)]["id"];
}, $personalDetails);
print_r($result);
Output:
Array
(
[0] => 110
[1] => 109
[2] => 108
[3] => 108
)
use array_column and json_decode
$new_one = array_column($array,'product_details');
$new_array=[];
foreach($new_one as $key=>$row)
{
foreach(json_decode($row,true) as $key1=>$row1)
{
$new_array[]=$row1['id'];
}
}
print_r($new_array);
you may use array_map & array_value to achieve this,
here is a quick example, and you need to modify it to be fit with your needs :
$ar = [
0 => ['product_details' => '{"5f93f983524def3dca464469d2cf9f3e":{"id": 3}}'],
1 => ['product_details' => '{"2723d092b63885e0d7c260cc007e8b9d":{"id": 8}}'],
2 => ['product_details' => '{"a3c65c2974270fd093ee8a9bf8ae7d0b":{"id": 5}}'],
3 => ['product_details' => '{"a3c65c2974270fd093ee8a9bf8ae7d0b":{"id": 1}}'],
];
$ar = array_map(function ($value) {
return array_values(json_decode($value['product_details'], true))[0]['id'];
}, $ar);
print_r($ar);
live demo : https://3v4l.org/koXee
Try this code, live demo
print_r(array_column(array_map(function($v){return current(json_decode($v));},array_column($array, 'product_details')), 'id'));
You "product_details" seems to be a JSON string. Loop through your array, decode the JSON and store the "id" in a new array.
I am trying to combine two arrays while respecting their shared value.
$array1 = array(
array("id" => "1","name"=>"John"),
array("id" => "2","name"=>"Peter"),
array("id" => "3","name"=>"Tom"),
array("id" => "12","name"=>"Astro")
);
$array2 = array(
array("id" => "1","second_name"=>"Lim"),
array("id" => "2","second_name"=>"Parker"),
array("id" => "3","second_name"=>"PHP")
);
My expected output:
$result = array(
array("id" => "1","name"=>"John","second_name"=>"Lim"),
array("id" => "2","name"=>"Peter","second_name"=>"Parker"),
array("id" => "3","name"=>"Tom","second_name"=>"PHP"),
array("id" => "12","name"=>"Astro")
);
I have made a try by
$arraycomb = array_unique(array_merge($array1,$array2), SORT_REGULAR);
My output is:
Array
(
[0] => Array
(
[id] => 1
[name] => John
)
[1] => Array
(
[id] => 2
[name] => Peter
)
[2] => Array
(
[id] => 3
[name] => Tom
)
[3] => Array
(
[id] => 12
[name] => Astro
)
[4] => Array
(
[id] => 1
[second_name] => Lim
)
[5] => Array
(
[id] => 2
[second_name] => Parker
)
[6] => Array
(
[id] => 3
[second_name] => PHP
)
)
How can I combine the key value inside same array? or how can I bring the expected output?
Note: I am trying for value instead of key ref: PHP Array Merge two Arrays on same key
Alternatively, you could use a foreach in this case then merge them if they share the same id key
With using reference &
foreach($array1 as &$value1) {
foreach ($array2 as $value2) {
if($value1['id'] == $value2['id']) {
$value1 = array_merge($value1, $value2);
}
}
}
echo '<pre>';
print_r($array1);
You can use array_map() for this. Try this -
function modifyArray($a, $b)
{
if (!empty($a) && !empty($b)) {
return array_merge($a, $b);
} else if (!empty($a) && empty($b)) {
return $a;
} else if (empty($a) && !empty($b)) {
return $b;
}
}
$new = array_map("modifyArray", $array1, $array2);
var_dump($new);
It will generate the new array will all the values in both arrays.if the first array's element is empty then the second array will be merged and vice-versa.
Assign temporary first level keys to your first array to aid in identifying rows. Then loop the second array and append the desired column value to the appropriate group. Re-index the array after looping with array_values().
Code: (Demo)
$result = array_column($array1, null, 'id');
foreach ($array2 as $row) {
$result[$row['id']]['second_name'] = $row['second_name'];
}
var_export(array_values($result));
This is a more direct approach than brute force scanning arrays with nested loops.
If all ids in the second array exist in the first array, then the following simpler line can be written inside the body of the foreach().
$result[$row['id']] += $row;
PHP's shuffle() is not randomizing an array the way I need it. I have a two dimensional array and when I use shuffle() on it it only randomizes the 2nd dimension of the array, but I need the opposite.
Lets assume this is the array I need to shuffle:
Array
(
[0] => Array
(
[key1] => 199
[key2] => 6
)
[1] => Array
(
[key1] => 195
[key2] => 3
)
)
The way the shuffle() shuffles it is like this:
Array
(
[0] => Array
(
[key1] => 195
[key2] => 3
)
[1] => Array
(
[key1] => 199
[key2] => 6
)
)
But this is not what I'm after. What I need as an end result is this:
Array
(
[1] => Array
(
[key1] => 195
[key2] => 6
)
[0] => Array
(
[key1] => 199
[key2] => 6
)
)
I know that this can be achieved this using a random key with rand() or mt_rand(), but it also could be possible that for a small amount of keys, we could receive the same rand() key twice, leading to NOT have a nicely shuffled array.
I also know that adding more if else logic would be a possibility, but I'm looking to do this with already implemented stuff - I don't wanna reinvent the wheel.
How can I achieve my desired shuffle?
shuffle() is working as intended. It is not "randomizing the 2nd dimension", it is not recursive.
It is reordering the elements of the array (which just happen to be arrays). The issue you are seeing is because shuffle() resets the array's keys.
From the docs (http://php.net/shuffle):
Note: This function assigns new keys to the elements in array. It will remove any existing keys that may have been assigned, rather than
just reordering the keys.
To get what you want, you need to use array_rand() to randomize the keys, then reorder the elements in the array based on that.
$randKeys = array_rand($array, count($array));
// This is needed because array_rand was changed
// and now returns the keys in order
shuffle($randKeys);
uksort($array, function($a, $b) use($randKeys){
return array_search($a, $randKeys) - array_search($b, $randKeys);
});
DEMO: https://eval.in/101265
In the comment section of the PHP manual for shuffle you find:
<?php
function shuffle_assoc(&$array) {
$keys = array_keys($array);
shuffle($keys);
foreach($keys as $key) {
$new[$key] = $array[$key];
}
$array = $new;
return true;
}
?>
$yourArray = array(
array('key1' => 199, 'key2' => 6),
array('key1' => 195, 'key2' => 3),
array('key1' => 205, 'key2' => 8)
);
$helperArr = array();
foreach($yourArray as $subArr)
{
foreach($subArr as $key => $value)
$helperArr[$key][] = $value;
}
foreach($helperArr as &$shuffleArr)
shuffle($shuffleArr);
$shuffledArr = array();
foreach($helperArr as $key => $value)
{
for($i = 0; $i < count($value); $i++)
$shuffledArr[$i][$key] = $value[$i];
}
echo '<pre>';
print_r($helperArr);
print_r($shuffledArr);
echo '</pre>';
DEMO
I have a multidimensional array and am trying to group them according to the value in a specific column.
I'm trying to group them by level, but I won't actually know the level beforehand. So, it's not like I can put it in a for loop and say while $i < 7, because I won't know that 7 is the maximum value for the level key, and frankly, I'm not sure that's how I would need to do it even if I did.
[
['cust' => 'XT8900', 'type' => 'standard', 'level' => 1],
['cust' => 'XT8944', 'type' => 'standard', 'level' => 1],
['cust' => 'XT8922', 'type' => 'premier', 'level' => 3],
['cust' => 'XT8816', 'type' => 'permier', 'level' => 3],
['cust' => 'XT7434', 'type' => 'standard', 'level' => 7],
]
Desired result:
Array (
[1] => Array (
[0] => Array (
[cust] => XT8900
[type] => standard
)
[1] => Array (
[cust] => XT8944
[type] => standard
)
)
[3] => Array (
[2] => Array (
[cust] => XT8922
[type] => premier
)
[3] => Array (
[cust] => XT8816
[type] => permier
)
)
[7] => Array (
[4] => Array (
[cust] => XT7434
[type] => standard
)
)
)
Best way, if you have control over building the initial array, is just set things up like that at the start as you add entries.
If not then build a temporary array to sort:
foreach ($input_arr as $key => &$entry) {
$level_arr[$entry['level']][$key] = $entry;
}
Leaves you with the form you wanted and everything referenced together.
Build the array like that in the first place though if at all possible.
You need to group them by level first
Use foreach to loop into array check if the level is the same with the previous item then group it with that array
$templevel=0;
$newkey=0;
$grouparr[$templevel]="";
foreach ($items as $key => $val) {
if ($templevel==$val['level']){
$grouparr[$templevel][$newkey]=$val;
} else {
$grouparr[$val['level']][$newkey]=$val;
}
$newkey++;
}
print($grouparr);
The output of print($grouparr); will display like the format you hoped for
You can also try to
print($grouparr[7]);
Will display
[7] => Array (
[4] => Array (
[cust] => XT7434
[type] => standard
)
)
Or
print($grouparr[3]);
Will display
[3] => Array (
[2] => Array (
[cust] => XT8922
[type] => premier
)
[3] => Array (
[cust] => XT8816
[type] => permier
)
)
Here is the solution I landed on for an identical problem, wrapped as a function:
function arraySort($input,$sortkey){
foreach ($input as $key=>$val) $output[$val[$sortkey]][]=$val;
return $output;
}
To sort $myarray by the key named "level" just do this:
$myArray = arraySort($myArray,'level');
Or if you didn't want it as a function, just for a one time use, this would create $myNewArray from $myArray grouped by the key 'level'
foreach ($myArray as $key=>$val) $myNewArray[$val['level']][]=$val;
function group_assoc($array, $key) {
$return = array();
foreach($array as $v) {
$return[$v[$key]][] = $v;
}
return $return;
}
//Group the requests by their account_id
$account_requests = group_assoc($requests, 'account_id');
$result = array();
foreach ($yourArrayList as $data) {
$id = $data['level'];
if (isset($result[$id])) {
$result[$id][] = $data;
} else {
$result[$id] = array($data);
}
}
Best ans.
$levels = array_unique(array_column($records, 'level'));
$data = array();
foreach($records as $key => $value){
$data[$levels[array_search($value['level'],$levels )]][] = $value ;
}
print_r($data);
To generate the question's exact desured output from the sample input, pull/pop the last value from each row, use that value as the first level grouping key. Then use the original first level index as the second level key. Then push the two remaining elements into the group's subset.
Code: (Demo)
$result = [];
foreach ($array as $key => $row) {
$result[array_pop($row)][$key] = $row;
}
var_export($result);
For functional style syntax, use array_reduce(). (Demo)
var_export(
array_reduce(
array_keys($array),
function($result, $key) use ($array) {
$result[array_pop($array[$key])][$key] = $array[$key];
return $result;
}
)
);
function _group_by($array,$key,$keyName)
{
$return = array();
foreach($array as $val) {
$return[$keyName.$val[$key]][] = $val;
}
return $return;
} //end of function