How to encode an associative array grouping one of its members?
$my_array = Array(
// customer 1
[0] => Array
(
[customer_id] => 1
[cutomer_item] => 7
)
[1] => Array
(
[customer_id] => 1
[cutomer_item] => 9
)
// customer 2
[2] => Array
(
[customer_id] => 2
[cutomer_item] => 3
)
[3] => Array
(
[customer_id] => 2
[cutomer_item] => 5
)
);
I wanto to group (csv) customers_items like:
[
// customer 1
{
"customer_id" : "1" // customer id preserved
"cutomer_items" : "7,9" // customer items imploded with a comma
}
,
// customer 2
{
"customer_id" : "2"
"cutomer_items" : "3,5"
}
]
I got confused with so many array functions (http://php.net/manual/en/ref.array.php).
You can use group_concat function in mysql query. if u are fetching the result through mysql
Here is an idea:
Code
<?php
$my_array = array(
array('customer_id' => 1, 'cutomer_item' => 7),
array('customer_id' => 1, 'cutomer_item' => 9),
array('customer_id' => 2, 'cutomer_item' => 3),
array('customer_id' => 2, 'cutomer_item' => 7),
);
sort($my_array);
$customer = '';
$gp_array = array();
$carr = false;
foreach($my_array as $item) {
if ($customer!=$item['customer_id']) {
if ($carr!==false) {
$carr['customer_items'] = implode(',',$carr['customer_items']);
$gp_array[] = $carr;
}
$carr = array('customer_id'=>$item['customer_id'], 'customer_items' => array());
}
$customer = $item['customer_id'];
$carr['customer_items'][] = $item['cutomer_item'];
}
if ($carr!==false) {
$carr['customer_items'] = implode(',',$carr['customer_items']);
$gp_array[] = $carr;
}
$json = json_encode($gp_array);
echo $json
?>
Output
[{"customer_id":1,"customer_items":"7,9"},{"customer_id":2,"customer_items":"3,7"}]
Related
How to update an array of objects, adding the quantities if you already have the same ID, or if you have not created a new object.
I tried to explain in the code with the arrays and also with the idea of how I would like the result to be.
old Array
$a1 = [
array(
"id" => 1,
"qty" => 1
),
array(
"id" => 2,
"qty" => 1
)
];
$a2 = [
array(
"id" => 1,
"qty" => 1
)
];
$output = array_merge($a1, $a2);
echo '<pre>';
print_r($output);
echo '</pre>';
Result Error:
Array
(
[0] => Array
(
[id] => 1
[qty] => 1
)
[1] => Array
(
[id] => 2
[qty] => 1
)
[2] => Array
(
[id] => 1
[qty] => 1
)
)
What I need, in addition to if the ID does not contain, add.
Array
(
[0] => Array
(
[id] => 1
[qty] => 2
)
[1] => Array
(
[id] => 2
[qty] => 1
)
)
You can take the first array as base, then search for the key (if existing) where the product matches the id. Then either add the quantity and recalculate the price or you just add the reformatted element (id to product conversion).
$result = $a;
foreach($b as $element) {
$matchingProductIndex = array_search($element['id'], array_column($a, 'product'));
if ($matchingProductIndex !== false) {
$pricePerUnit = $result[$matchingProductIndex]['price'] / $result[$matchingProductIndex]['qty'];
$result[$matchingProductIndex]['qty'] += $element['qty'];
$result[$matchingProductIndex]['price'] = $result[$matchingProductIndex]['qty'] * $pricePerUnit;
} else {
$result[] = [
'qty' => $element['qty'],
'product' => $element['id'],
'price' => $element['price'],
];
}
}
print_r($result);
Working example.
Loop through both arrays with foreach and check the ids against each other.
https://paiza.io/projects/lnnl5HeJSFIOz_6KD6HRIw
<?php
$arr1 = [['qty' => 4, 'id' => 4],['qty' => 1,'id' => 30]];
$arr2 = [['id' => 30, 'qty' => 19],['id' => 31, 'qty' => 2]];
$arr3 = [];
foreach($arr1 as $iArr1){
$match = false;
foreach($arr2 as $iArr2){
if($iArr1['id'] === $iArr2['id']){
$arr3[] = ['id' => $iArr1['id'], 'qty' => $iArr1['qty'] + $iArr2['qty']];
$match = true;
}
}
if(!$match){
$arr3[] = $iArr1;
$arr3[] = $iArr2;
}
}
print_r($arr3);
?>
One approach could be one I more often suggested.
First lets merge $a2 with one to simplify looping over one larger collection.
If we then create a small mapping from id to its index in the result array we can update the running total of qty.
$map = [];
$result = [];
// Merge the two and do as per usual, create a mapping
// from id to index and update the qty at the corresponding index.
foreach (array_merge($a1, $a2) as $subarr) {
$id = $subarr['id'];
if (!key_exists($id, $map)) {
$index = array_push($result, $subarr) - 1;
$map[$id] = $index;
continue;
}
$result[$map[$id]]['qty'] += $subarr['qty'];
}
echo '<pre>', print_r($result, true), '</pre>';
Output:
Array
(
[0] => Array
(
[id] => 1
[qty] => 2
)
[1] => Array
(
[id] => 2
[qty] => 1
)
)
I have an array with same customerid. I want to merge all same customerid arrays in to one with few amends to the array.
Array
(
[0] => Array
(
[customerid] => 13
[customer_fullname] => Chris
[profession_id] => 8
[profession_name] => Producer
)
[1] => Array
(
[customerid] => 1
[customer_fullname] => John
[profession_id] => 8
[profession_name] => Producer
)
[2] => Array
(
[customerid] => 13
[customer_fullname] => Chris
[profession_id] => 7
[profession_name] => Camera
)
)
So now I want a new array to be created like this:
Array(
[customerid] => 13
[customer_fullname] => Chris
[new_array] => array(
[0]=>[profession_id] => 8, [profession_name] => Producer,
[1]=>[profession_id] => 7, [profession_name] => Camera
)
)
Spent some time on it but wasn't able to get it right
There are better approaches if you're merging lots of records, but if you want a way to just merge two records as stated, I'd just do this:
$array1 = array(
'customerid' => 13
'customer_fullname' => 'John',
'profession_id' => 8,
'profession_name' => 'Producer'
);
$array2 = array(
'customerid' => 13
'customer_fullname' => 'John',
'profession_id' => 7,
'profession_name' => 'Director'
);
function merge_customers($customerA, $customerB)
{
$newCustomer = array();
if ($customerA['customerid'] == $customerB['customerid'])
{
$newCustomer['customerid'] = $customerA['customerid'];
$newCustomer['customer_fullname'] = $customerA['customer_fullname'];
$newCustomer['new_array'] = array(
array(
'profession_id' => $customerA['profession_id'],
'profession_name' => $customerA['profession_name']
),
array(
'profession_id' => $customerB['profession_id'],
'profession_name' => $customerB['profession_name']
)
);
return $newCustomer;
}
/* We can't merge these if they're different customers. */
return NULL;
}
The extended solution which is also well-suited for finding and "merging" multiple groups of entries which has same customerid. Used functions: array_filter, array_count_values, array_keys, array_walk, array_chunk and array_values:
// supposing $arr is your initial array
// finds which 'customerid' has multiple entries
$dupIds = array_filter(array_count_values(array_column($arr, "customerid")), function($v) {
return $v > 1;
});
$dupIds = array_keys($dupIds);
$result = [];
array_walk($arr, function($v) use(&$result, $dupIds) {
if (in_array($v['customerid'], $dupIds)) {
$parts = array_chunk($v, 2, true);
if (!isset($result[$v['customerid']])) {
$result[$v['customerid']] = $parts[0] + ['new_array' => [$parts[1]]];
} else {
$result[$v['customerid']]['new_array'][] = $parts[1];
}
}
});
print_r(array_values($result));
The output:
Array
(
[0] => Array
(
[customerid] => 13
[customer_fullname] => Chris
[new_array] => Array
(
[0] => Array
(
[profession_id] => 8
[profession_name] => Producer
)
[1] => Array
(
[profession_id] => 7
[profession_name] => Camera
)
)
)
)
Quick hack, maybe there is a nicer solution.
Note: The second "for each" loop is only needed if there is the possibility that the arrays don't have the same fields.
function merge($array1, $array2){
$result = array();
foreach($array1 as $key => $value){
if(isset($array2[$key]) && $array2[$key]!=$array1[$key]){
$result[$key][]=$value;
$result[$key][]=$array2[$key];
}else{
$result[$key]=$value;
}
}
foreach($array2 as $key => $value){
if(!isset($result[$key])){
$result[$key] = $value;
}
}
return $result;
}
print_r(merge($array1, $array2));
I have 2 array's, first array have for example ItemID of my item, second array have description about my item. I want to match data into 1 array.
It looks like:
[rgInventory] => Array
(
[1234567890] => Array
(
[id] => 1234567890
[classid] => 123456789
[instanceid] => 987654321
[amount] => 1
[pos] => 1
)
)
[rgDescriptions] => Array
(
[192837465_918273645] => Array
(
[appid] => 730
[name] => Something
)
)
Items in arrays don't have the same value like ID, but they are in the same order so:
Description for the first item in rgInventory is in the first array inside rgDescriptions.
What should I do to match for example id from rgInventory with name from rgDescriptions in the same array for example $backpack = array();?
Regards for you.
Try this:
<?php
$array1 = array('rgInventory' =>
array(
'1234567890' => array(
'id' => 1234567890,
'classid' => 123456789,
'instanceid' => 987654321,
'amount' => 1,
'pos' => 1
)
)
);
$array2 = array(
'rgDescriptions' => array(
'192837465_918273645' => array(
'appid' => 730, 'name' => 'Something')
)
);
Create new function to combine the two arrays into one array:
function array_sum_recursive($data1, $data2) {
if (!is_array($data1) && !is_array($data2)) {
return $data1 + $data2;
}
// deepest array gets precedence
if (!is_array($data2)) {
return $data1;
}
if (!is_array($data1)) {
return $data2;
}
//merge and remove duplicates
$keys = array_unique(array_merge(array_keys($data1), array_keys($data2)));
foreach ($keys as $key) {
if (isset($data1[$key]) && isset($data2[$key])) {
$result[$key] = array_sum_recursive($data1[$key], $data2[$key]);
} else if (isset($data1[$key])) {
$result[$key] = $data1[$key];
} else {
$result[$key] = $data2[$key];
}
}
if(empty($result)){
echo "no result";
die();
}else{
return $result;
}
}
Put the two array in one array $newarray:
$newonearray = array_sum_recursive($array1, $array2);
echo '<pre>';
print_r($newonearray);
?>
And you will get this:
Array
(
[rgInventory] => Array
(
[1234567890] => Array
(
[id] => 1234567890
[classid] => 123456789
[instanceid] => 987654321
[amount] => 1
[pos] => 1
)
)
[rgDescriptions] => Array
(
[192837465_918273645] => Array
(
[appid] => 730
[name] => Something
)
)
)
Hope this may help.
You can use function each to get each element of both arrays, then merge its with array_merge and save this new item to backup array.
Try something like this
<?php
$rgInventory = ['firstInv' => ['invId' => 1], 'secondInv' => ['invId' => 2]];
$rgDescriptions = ['firstDesc' => ['descId' => 1], 'secondDesc' => ['descId' => 2]];
if (count($rgInventory) && count($rgInventory) == count($rgDescriptions)) {
$backpack = [];
while($inventory = each($rgInventory)) {
$description = each($rgDescriptions);
$item = array_merge($inventory['value'], $description['value']);
$backpack[] = $item;
}
var_dump($backpack);
}
Output will be:
array(2) {
[0]=>
array(2) {
["invId"]=>
int(1)
["descId"]=>
int(1)
}
[1]=>
array(2) {
["invId"]=>
int(2)
["descId"]=>
int(2)
}
}
I'm processing the final results of competitions and its general report on the best trainer and which place the trainer should get.
I have already prepared associative arrays below. The key represents trainer's id and the value represents the number of medals in a category (gold, silver, bronze) that his/her athletes got.
[gold] => Array
(
[777777] => 4
[333333] => 2
[555555] => 1
[999999] => 1
)
[silver] => Array
(
[999999] => 3
[777777] => 3
[333333] => 2
)
[bronze] => Array
(
[333333] => 6
[777777] => 4
[999999] => 2
)
Next array associates trainer's id with its name:
[trainers] => Array
(
[333333] => Trainer 4
[777777] => Trainer 1
[999999] => Trainer 2
[555555] => Trainer 3
)
I have stuck processing the data above into final results like this. Any ideas on how it could be done elegantly? The problem is that the data is never constant and the size of the array is always different.
Any help would be greatly appreciated.
Here is code sample:
$gold, $silver, $bronze, $trainers are arrays with information you provided.
$out = [];
foreach($trainers as $trainerId=> $trainerName){
$out[] = array(
'id'=>$trainerId,
'name'=>$trainerName,
'gold'=>isset($gold[$trainerId])?$gold[$trainerId]:0,
'silver'=>isset($silver[$trainerId])?$silver[$trainerId]:0,
'bronze'=>isset($bronze[$trainerId])?$bronze[$trainerId]:0,
);
}
uasort($out, function($a, $b){
// Here: sort by your algorithm. Here is example:
if($a['gold'] != $b['gold']){
return $b['gold'] - $a['gold'];
}
if($a['silver'] != $b['silver']){
return $b['silver'] - $a['silver'];
}
return $b['bronze'] - $a['bronze'];
});
$placeId = 1;
foreach($out as &$info){
$info['place'] = $placeId++;
}
unset($info);
foreach($out as $info){
echo "{$info['place']} place goes to - {$info['name']} ({$info['id']}) as he/she got {$info['gold']} gold medals, {$info['silver']} silver and {$info['bronze']} bronze";
}
Here is another way to do it with metrics:
$gold = array
(
'777777' => 4,
'333333' => 2,
'555555' => 1,
'999999' => 1
);
$silver = array
(
'999999' => 3,
'777777' => 3,
'333333' => 2
);
$bronze = array
(
'333333' => 6,
'777777' => 4,
'999999' => 2
);
$trainers = array
(
'333333' => 'Trainer 4',
'777777' => 'Trainer 1',
'999999' => 'Trainer 2',
'555555' => 'Trainer 3'
);
$metrics = [
'gold' => 3,
'silver'=> 2,
'bronze' => 1];
$results = [];
foreach ($metrics as $arrName => $metric)
{
foreach (${$arrName} as $trainerId => $medals)
{
$results[$trainerId] = ( isset($results[$trainerId]) ) ? $results[$trainerId]+$medals * $metric : $medals * $metric;
}
}
// sorting scores (by value)
arsort($results);
// print scores
var_dump($results);
// print final results
$placeOut = '';
foreach ($results as $trainerId => $score) {
$placeOut .= $trainers[$trainerId].": he/she has ";
foreach ($metrics as $medalName => $metric) {
$placeOut .= (${$medalName}[$trainerId] > 0 ? ${$medalName}[$trainerId] : 0)." ".$medalName.", ";
}
$placeOut .= "\n";
}
echo "<pre>".$placeOut."</pre>";
?>
I want to create a list where if its already in the array to add to the value +1.
Current Output
[1] => Array
(
[source] => 397
[value] => 1
)
[2] => Array
(
[source] => 397
[value] => 1
)
[3] => Array
(
[source] => 1314
[value] => 1
)
What I want to Achieve
[1] => Array
(
[source] => 397
[value] => 2
)
[2] => Array
(
[source] => 1314
[value] => 1
)
My current dulled down PHP
foreach ($submissions as $timefix) {
//Start countng
$data = array(
'source' => $timefix['parent']['id'],
'value' => '1'
);
$dataJson[] = $data;
}
print_r($dataJson);
Simply use an associated array:
$dataJson = array();
foreach ($submissions as $timefix) {
$id = $timefix['parent']['id'];
if (!isset($dataJson[$id])) {
$dataJson[$id] = array('source' => $id, 'value' => 1);
} else {
$dataJson[$id]['value']++;
}
}
$dataJson = array_values($dataJson); // reset the keys - you don't nessesarily need this
This is not exactly your desired output, as the array keys are not preserved, but if it suits you, you could use the item ID as the array key. This would simplify your code to the point of not needing to loop through the already available results:
foreach ($submissions as $timefix) {
$id = $timefix['parent']['id'];
if (array_key_exists($id, $dataJson)) {
$dataJson[$id]["value"]++;
} else {
$dataJson[$id] = [
"source" => $id,
"value" => 1
];
}
}
print_r($dataJson);
You should simplify this for yourself. Something like:
<?
$res = Array();
foreach ($original as $item) {
if (!isset($res[$item['source']])) $res[$item['source']] = $item['value'];
else $res[$item['source']] += $item['value'];
}
?>
After this, you will have array $res which will be something like:
Array(
[397] => 2,
[1314] => 1
)
Then, if you really need the format specified, you can use something like:
<?
$final = Array();
foreach ($res as $source=>$value) $final[] = Array(
'source' => $source,
'value' => $value
);
?>
This code will do the counting and produce a $new array as described in your example.
$data = array(
array('source' => 397, 'value' => 1),
array('source' => 397, 'value' => 1),
array('source' => 1314, 'value' => 1),
);
$new = array();
foreach ($data as $item)
{
$source = $item['source'];
if (isset($new[$source]))
$new[$source]['value'] += $item['value'];
else
$new[$source] = $item;
}
$new = array_values($new);
PHP has a function called array_count_values for that. May be you can use it
Example:
<?php
$array = array(1, "hello", 1, "world", "hello");
print_r(array_count_values($array));
?>
Output:
Array
(
[1] => 2
[hello] => 2
[world] => 1
)