Remove duplicate item from multidimensional array

Remove duplicate item from multidimensional array - php

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);

Related

How to count multiple dates in php array

How I can count same values in the Array. I have read about the array_count_values() but this function can only count Integer or String values but My problem is that I want to count same dates in the Array, How can I count the same dates in the Array.
I have tried this array_count_values() but this gives me this error.
A PHP Error was encountered
Severity: Warning
Message: array_count_values(): Can only count STRING and INTEGER values!
Filename: controllers/Dashboard.php
Line Number: 72
Backtrace:
File: /opt/lampp/htdocs/blink_app/application/controllers/Dashboard.php
Line: 72
Function: array_count_values
File: /opt/lampp/htdocs/blink_app/index.php
Line: 315
Function: require_once
And Here Is my Array.
Array
(
[0] => stdClass Object
(
[id] => 1
[saloon_staff_id] => 1
[users_id] => 5
[ref_id] => 1
[date] => 2017-11-02
[time_from] => 12:15:00
[time_to] => 13:30:00
[appointment_status] => 2017-11-23
[saloon_services_id] => 3
[saloon_profiles_id] => 1
[phone_number] => 098098098
[email] => SalmanIq#facebook.com
[appointments_enabled] => 1
[role_in_saloon] => Owner
[name] => Salman Iqbal
)
[1] => stdClass Object
(
[id] => 2
[saloon_staff_id] => 2
[users_id] => 6
[ref_id] => 2
[date] => 2017-11-02
[time_from] => 04:30:00
[time_to] => 05:00:00
[appointment_status] => 2017-11-25
[saloon_services_id] => 2
[saloon_profiles_id] => 1
[phone_number] => 98790809809
[email] => alludin#gmail.com
[appointments_enabled] => 1
[role_in_saloon] => No Access
[name] => Alludin
)
[2] => stdClass Object
(
[id] => 1
[saloon_staff_id] => 1
[users_id] => 7
[ref_id] => 3
[date] => 2017-11-04
[time_from] => 03:00:00
[time_to] => 03:30:00
[appointment_status] => 2017-11-28
[saloon_services_id] => 2
[saloon_profiles_id] => 1
[phone_number] => 098098098
[email] => SalmanIq#facebook.com
[appointments_enabled] => 1
[role_in_saloon] => Owner
[name] => Salman Iqbal
)
[3] => stdClass Object
(
[id] => 3
[saloon_staff_id] => 3
[users_id] => 7
[ref_id] => 4
[date] => 2017-11-28
[time_from] => 01:00:00
[time_to] => 02:00:00
[appointment_status] => 2017-11-28
[saloon_services_id] => 1
[saloon_profiles_id] => 1
[phone_number] => 9080809
[email] => mubi#yahoo.com
[appointments_enabled] => 0
[role_in_saloon] => Owner
[name] => mubassir
)
)
Any Help Will be Appreciated.

You can take a column out of multi-dimensional array on which you want to do aggregation / count.
<?php
$array = [['name' => 'foo', 'date' => '2017-11-28'], ['name' => 'bar', 'date' => '2017-11-29'], ['name' => 'baz', 'date' => '2017-11-28']];
$dates = array_column($array, 'date'); // here 1st param is the array
This will give you
Array
(
[0] => 2017-11-28
[1] => 2017-11-29
[2] => 2017-11-28
)
Now you can call array_count_values like:
print_r(array_count_values($dates));
Array
(
[2017-11-28] => 2
[2017-11-29] => 1
)

flatten multidimensional array recursive 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

PHP Joomla template index.php JCategoryNode output instead of current category ID number

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 return object data of multiple indexing without foreach in php

You can use array_map function
do something like :
$data = array_map(function($model){
return $model['object_type']['Name'];
},$modelData);
the code is not tested, but it should be something like this
Based on what your var_dump response was to the other solution, try :
$data = array_map(function($model){
return $model['object_type']['Name']['text'];
},$modelData);

How about JSON? You can get a string from array.
http://www.php.net/manual/en/function.json-encode.php

I'm not sure if this is what you wanted but in case it is, I tried doing the same thing, to get an array without the alias like: $array['first_name'] instead of $array['User']['first_name'] in order to print it in JSON format, but unfortunatelly there is no way to natively do that, so I sticked to the foreach

If not foreach, then try for because to iterate arrays you have to use some loops and the fastest is for as below
$data = array();
$size = sizeof($modelData);
for($i=0; $i<=$size; $i++)
{
$data[] = $modelData[$i][$model->name];
}
return $data;

try
$final_array = array_map(
function ($a) {
return $a['object_types']['Name'];
},
$modelData
);
print_r($final_array);

We Keep Coding

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

Remove duplicate item from multidimensional array - php

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

Related

How to count multiple dates in php array

flatten multidimensional array recursive php

PHP Joomla template index.php JCategoryNode output instead of current category ID number

How to re-arrange Array in php

how to return object data of multiple indexing without foreach in php

Categories

Resources