Php check and replace if value exist in multi array? - php

Question

Problem:
I dont know/understand how to check if date and place exists on the same "row" and they exists more then once.
Second, how do i then merge an array
my case MergeArray with ArraySchedule
Code:
$ArraySchedule = array();
while ($data = $stmt -> fetch(PDO::FETCH_ASSOC)) {
$schedules = array(
"id" => $data['id'],
"name" => $data['name'],
"date" => $data['date'],
"time" => $data['time'],
"place_id" => $data['place_id'],
"place" => $data['place'],
);
array_push($ArraySchedule, $schedules);
}
$dupe_array = array();
foreach ($ArraySchedule as $key => $value) {
if(++$dupe_array[$value["date"]] > 1 && ++$dupe_array[$value["place_id"]] > 1 ){
// this statement is wrong, i want something like:
// if date and place_id exists on the same "row" and they exists more then once
}
}
What i want to do:
Check if ArraySchedule contains schedules that have the same date and place,
if there is more than one schedule that has the same date and place_id.
then I want to update ArraySchedule with this structure
$MergeArray = array(
"id" => ArraySchedule['id'],
"name" => array(
"name" => scheduleSameDateAndPlace['name'],
"name" => scheduleSameDateAndPlace['name'],
"name" => scheduleSameDateAndPlace['name'],
),
"date" => $ArraySchedule['date'],
"time" => $ArraySchedule['time'],
"place_id" => $ArraySchedule['place_id'],
"place_name" => $ArraySchedule['place_name'],
),
MergeArray with ArraySchedule?
anyway...
Output I think I want?
Print_r($ArraySchedule)
array(
[0] =>
array(
[id] => 1
[names] => Simon
[date] => 2019-01-02
[time] 18.00
[place_id] => Tystberga Park
[place] => Tystberga
)
[1] =>
array(
[id] => 2
//[names] insted of [name]?
[names] =>
array(
[name] => Vincent
[name] => Angel
[name] => Kim
)
[date] => 2019-02-17
[time] => 13.00
[place_id] => Borås Park
[place] => Borås
)
[2] =>
array(
[id] => 3
// [names] is always an array?
[names] => Caitlyn
[date] => 2019-03-15
[time] 13.00
[place_id] => Plaza Park
[place] => EvPark
)
)

Answer 1

You can use array-reduce. Consider the following:
function mergeByDateAndPlace($carry, $item) {
$key = $item["place_id"] . $item["date"]; // creating key matching exact place and date
if (!isset($carry[$key])) {
$carry[$key]["name"] = $item["name"];
} else {
$carry[$key] = $item;
$item["name"] = [$item["name"]]; // make default array with 1 element so later can be append other names
}
return $carry;
}
Now use it with:
$MergeArray = array_reduce($ArraySchedule, "mergeByDateAndPlace", []);
If you later want to know if there were any duplicate you can just loop on $MergeArray. You can also use array_values if you want to discard the concat keys.
Notice #Nick 2 important comment about saving the first loop and the "time" value that need to be decided. Also notice your desire output contain multi element with the same key ("name") - you need to append them with int key - Array can not have duplicate keys.
Hope that helps!

Answer 2

Here is my data from my database:
var_export($ArraySchedule)
array (
0 => array ( 'id' => '225', 'place_id' => 'Alviks Kulturhus', 'name' => 'BarraBazz', 'date' => '2019-03-19', 'placeadress' => 'Gustavslundsvägen 1', ),
1 => array ( 'id' => '229', 'place_id' => 'Axelhuset Göteborg', 'name' => 'Anders Björk', 'date' => '2019-04-08', 'placeadress' => 'Axel Dahlströms torg 3', ),
2 => array ( 'id' => '230', 'place_id' => 'Axelhuset Göteborg', 'name' => 'Black Jack', 'date' => '2019-04-08', 'placeadress' => 'Axel Dahlströms torg 3', ),
3 => array ( 'id' => '227', 'place_id' => 'Arosdansen Syrianska Kulturcentret', 'name' => 'BarraBazz', 'date' => '2019-05-08', 'placeadress' => 'Narvavägen 90', ),
4 => array ( 'id' => '228', 'place_id' => 'Aspåsnäset', 'name' => 'Blender', 'date' => '2019-05-25', 'placeadress' => 'Aspåsnäset 167', ),
5 => array ( 'id' => '226', 'place_id' => 'Arenan Västervik Resort', 'name' => 'Blender', 'date' => '2019-06-29', 'placeadress' => 'Lysingsvägen', ),
6 => array ( 'id' => '222', 'place_id' => 'Alingsåsparken', 'name' => 'Bendéns', 'date' => '2019-07-16', 'placeadress' => 'Folkparksgatan 3A', ),
7 => array ( 'id' => '223', 'place_id' => 'Alingsåsparken', 'name' => 'Charlies', 'date' => '2019-07-16', 'placeadress' => 'Folkparksgatan 3A', ),
8 => array ( 'id' => '224', 'place_id' => 'Allhuset Södertälje', 'name' => 'Cedrix', 'date' => '2019-07-16', 'placeadress' => 'Barrtorpsvägen 1A', ), )
I want to update the "name" with an array of names everytime that place_id and date are the same.
This is the output I want:
Array (
[0] =>
Array ( [id] => 225 [place_id] => Alviks Kulturhus [name] => BarraBazz [date] => 2019-03-19 [placeadress] => Gustavslundsvägen 1 )
[1] =>
Array ( [id] => 229 [place_id] => Axelhuset Göteborg [name] => Array([0] => Anders Björk [1] => Black Jack ) [date] => 2019-04-08 [placeadress] => Axel Dahlströms torg 3 )
[3] =>
Array ( [id] => 227 [place_id] => Arosdansen Syrianska Kulturcentret [name] => BarraBazz [date] => 2019-05-08 [placeadress] => Narvavägen 90 )
[4] =>
Array ( [id] => 228 [place_id] => Aspåsnäset [name] => Blender [date] => 2019-05-25 [placeadress] => Aspåsnäset 167 )
[5] =>
Array ( [id] => 226 [place_id] => Arenan Västervik Resort [name] => Blender [date] => 2019-06-29 [placeadress] => Lysingsvägen )
[6] =>
Array ( [id] => 222 [place_id] => [Alingsåsparken] [name] => Array([0] => Bendéns [1] => Charlies) [date] => 2019-07-16 [placeadress] => Folkparksgatan 3A )
[8] =>
Array ( [id] => 224 [place_id] => Allhuset Södertälje [name] => Cedrix [date] => 2019-07-16 [placeadress] => Barrtorpsvägen 1A ) )
Here is my updated code
$sql = "SELECT `schedule`.`id`,`schedule`.`place_id`,`schedule`.`name`,`schedule`.`date`,`places`.`placeadress` FROM `schedule` INNER JOIN `places` ON `schedule`.`place_id`=`places`.`place_id` ORDER BY `date`";
$stmt = $db -> prepare($sql);
$stmt -> execute();
$ArraySchedule = $stmt->fetchAll(PDO::FETCH_ASSOC);
var_export($ArraySchedule);
$DatePlace = array();
foreach ($ArraySchedule as $key => $Schedule){
$Arrayquery = "SELECT `schedule`.`id`,`schedule`.`place_id`,`schedule`.`name`,`schedule`.`date`,`places`.`placeadress` FROM `schedule` INNER JOIN `places` ON `schedule`.`place_id`=`places`.`place_id` WHERE `schedule`.`date`= :date_ AND `schedule`.`place_id` = :place_id ORDER BY `date`";
$ArrayStmt = $db->prepare($Arrayquery);
$ArrayStmt -> execute(array(":date_" => $Schedule['date'],":place_id" => $Schedule['place_id']));
//Getting every $Schedule that has the same date and place_id
if($ArrayStmt->rowCount() > 1){
//Here i want two update the name inside
//$ArrayArraySchedule with an array of names
//that has the same place and date?
}
}
print_r($ArraySchedule);