flatten multidimensional array recursive php

flatten multidimensional array recursive php - php

I don't know why you need to do this complicated flatting , and I'm pretty sure that you can -as it's seems that you are fetching data from database- that you can accomplish this easier that the following way, However you may need to use recursion here, for example :
// Sample data
$arr = [
['level' => 1, 'data' => [['level' => 2],['level' => 3, 'data' => [['level' => 6]]]]],
['level' => 4],
['level' => 9, 'data' => [['level' => 8]]],
];
function flat($data, &$list = [])
{
foreach ($data as $key => $value) {
if (isset($value['data']) && is_array($value['data'])) {
$tmp = $value['data'];
unset($value['data']);
flat($tmp, $list);
}
$list[] = $value;
}
return $list;
}
print_r(flat($arr));
Live sample : https://3v4l.org/Rtn5f
P.S often recursion is more expensive with big arrays

Related

Remove duplicate item from multidimensional array

Best practice (and a technique that you will find implemented in Stackoverflow questions every day) is to assign temporary keys, overwrite any pre-existing subarrays based on the temporary keys, then remove the temporary keys at the end.
This avoids having to do iterated lookups. For highest efficiency in your codes, try to minimize iterated function calls.
Method #1: Remove earlier duplicate occurrences / Retain last occurrences (Demo)
foreach($guardian->guardians as $subarray){
$result[$subarray->id]=$subarray; // assign temporary keys
}
$guardian->guardians=array_values($result); // re-declare and remove temporary keys (re-index the subarrays)
var_export($guardian);
*Alternatively, here is a functional-style one-liner providing the same effect: (Demo)
$guardian->guardians=array_values(array_column((array)$guardian->guardians,NULL,'id'));
var_export($guardian);
For those who don't know, array_column() chokes on objects, so objects must be temporarily converted to arrays.
Method #2: Remove later duplicate occurrences / Retain first occurrences (Demo)
foreach($guardian->guardians as $subarray){
if(!isset($result[$subarray->id])){
$result[$subarray->id]=$subarray; // only store if first occurrence of id
}
}
$guardian->guardians=array_values($result); // re-index
var_export($guardian);

I've managed to get a working answer by doing as following:
$tempGuardians = array();
foreach($guardian->guardians as $key => $value){
if (in_array($value->id, $tempGuardians)){
unset($guardian->guardians[$key]);
} else {
array_push($tempGuardians, $value->id);
}
}
unset($tempGuardians);
If anyone knows any cleaner ways or better ways of doing this, I'm open to new ways.

The answer is included on your question, you already said it: array_unique:
$newArray=array_unique($a1);

Left join return duplicate data although I used GROUP BY

You can select DISTINCT on the most unique identifier you have, which would be orders_products.id most likely.
Example:
SELECT DISTINCT(orders_products.id) FROM orders_products WHERE x = '$y';
I don't see a GROUP BY statement in your original query.

formatting an array using php

You need to do like below:-
<?php
$firstArray = Array
(
'0' => Array
(
'orders' => Array
(
'id' => 9,
'name' => 'Abdus Sattar Bhuiyan',
'email' => 'sattar.kuet#gmail.com',
'mobile' => '01673050495',
'alt_mobile' => '01818953250',
'city_id' => 2,
'location_id' => 5,
'status' => 'No contact',
'chashed' => 'NO',
'created' => '2015-06-27 12:49:34',
'modified' => '2015-06-27 12:49:34',
'comment' => ''
),
'order_products' => Array
(
'id' => 2,
'order_id' => 9,
'product_id' => 1,
'pieces' => 1
),
'products' => Array
(
'id' => 1,
'category_id' => 1,
'name' => 'নভোযানের নাম সি প্রোগ্রামিং',
'writer' => 'Engr. Abdus Sattar Bhuiyan',
'created' => '2015-06-24 16:17:45'
),
'psettings' => Array
(
'id' => 1,
'category_id' => 1,
'product_id' => 1,
'img' => '1.jpg',
'desc' => 'description',
'created' => '2015-06-28 00:28:26',
'bppp' => 44000,
'sppp' => 45000,
'discount' => 25,
'service_charge' => 30
),
),
'1' => Array
(
'orders' => Array
(
'id' => 9,
'name' => 'Abdus Sattar Bhuiyan',
'email' => 'sattar.kuet#gmail.com',
'mobile' => '01673050495',
'alt_mobile' => '01818953250',
'city_id' => 2,
'location_id' => 5,
'status' => 'No contact',
'chashed' => 'NO',
'created' => '2015-06-27 12:49:34',
'modified' => '2015-06-27 12:49:34',
'comment' => ''
),
'order_products' => Array
(
'id' => 3,
'order_id' => 9,
'product_id' => 2,
'pieces' => 1
),
'products' => Array
(
'id' => 2,
'category_id' => 1,
'name' => 'Resonance of creativity with C++',
'writer' => 'Engr. Abdus Sattar Bhuiyan',
'created' => '2015-06-26 07:32:52'
),
'psettings' => Array
(
'id' => 2,
'category_id' => 1,
'product_id' => 2,
'img' => '2.jpg',
'desc' => '',
'created' => '2015-06-26 07:33:41',
'bppp' => 150,
'sppp' => 250,
'discount' => 20,
'service_charge' => 30
),
),
'2' => Array
(
'orders' => Array
(
'id' => 9,
'name' => 'Abdus Sattar Bhuiyan',
'email' => 'sattar.kuet#gmail.com',
'mobile' => '01673050495',
'alt_mobile' => '01818953250',
'city_id' => 2,
'location_id' => 5,
'status' => 'No contact',
'chashed' => 'NO',
'created' => '2015-06-27 12:49:34',
'modified' => '2015-06-27 12:49:34',
'comment' => ''
),
'order_products' => Array
(
'id' => 4,
'order_id' => 9,
'product_id' => 3,
'pieces' => 1
),
'products' => Array
(
'id' => 3,
'category_id' => 1,
'name' => 'programming by story C',
'writer' => 'Hasibul Hasan Shanto',
'created' => '2015-06-26 07:35:57'
),
'psettings' => Array
(
'id' => 3,
'category_id' => 1,
'product_id' => 3,
'img' => '3.jpg',
'desc' => '',
'created' => '2015-06-26 07:36:26',
'bppp' => 150,
'sppp' => 250,
'discount' => 10,
'service_charge' => 30
),
),
);
$new_array = array();
foreach($firstArray as $key=> $arr){
if($key == 0){
$new_array[0]['orders'] = $arr['orders'];
$new_array[0]['order_products'][] = $arr['order_products'];
$new_array[0]['products'][] = $arr['products'];
$new_array[0]['psettings'][] = $arr['psettings'];
}else{
foreach($new_array as $key=> $newarr){
if($arr['orders'] == $newarr['orders']){
$new_array[$key]['order_products'][] = $arr['order_products'];
$new_array[$key]['products'][] = $arr['products'];
$new_array[$key]['psettings'][] = $arr['psettings'];
}else{
$new_array[] = $arr;
}
}
}
}
echo "<pre/>";print_r($new_array);
?>
Output:- https://eval.in/388565.
Note:- don't worry about the array i putted. I just take your array and formatted it for running purpose and checking at my end. thanks.

How to re-arrange Array in php

PHP is pretty well documented and you can find all of the Array sorting methods on this page.
There are some good examples in the comments as well - all you need to do is to sort the array by category and you are done.

How to print assosiative array data

This is very beginner level question.
foreach ($YourVariable as $arr_of_objs ) {
foreach ($arr_of_objs->workshop_dates as $obj) {
echo $obj->start_date;
echo $obj->end_date;
# code...
}
}

Try this -
$obj = //your object
$newArray = (array)$obj;//converting object to array
foreach ($newArray as $val) {
foreach ($val['workshop_dates'] as $value) {
echo $value['start_date']. ' ' .$value['end_date'];
}
}

Assuming the objects are implementing ArrayAccess. You would do:
foreach ($object as $obj) {
foreach($obj[workshop_dates] as $workshopdate) {
$startDate = $workshopdate ['start_date'];
$endDate = $workshopdate ['end_date'];
}
}

We Keep Coding

PHP, A popular general-purpose scripting language that is especially suited to web development.

flatten multidimensional array recursive php - php

Related

Remove duplicate item from multidimensional array

Left join return duplicate data although I used GROUP BY

formatting an array using php

How to re-arrange Array in php

How to print assosiative array data

Categories

Resources