Increment count for value in foreach loop PHP - php

Question

I am trying to count the instances of rfid from one array to insert into another array so I can use this data to create charts.
At the moment my code is as follows
if ($message == "Broken" && $message_type == "BreakBeam" && $previous==$cat_id) {
$total = 1;
$splitTimeStamp = explode(" ",$eventtime);
$date = $splitTimeStamp[0];
$time = $splitTimeStamp[1];
$events[$c]['date'] = $date;
$events[$c]['device'] = $device;
$events[$c]['time']= $time;
$events[$c]['rfid']= $previous;
$events[$c]['count']=$total;
$c++;
}
}
$a = array();
$i=0;
foreach($events as $event){
if(isset($a[$event['rfid']])){
$a['rfid_id'][$event['rfid']]++;
}else{
$a['rfid_id'][$event['rfid']]=1;
}
if(isset($a[$event['date']])){
$a['dateinsert'][$event['date']]++;
}else{
$a['dateinsert'][$event['date']] =1;
}
}
$rfid = array();
// those are the ones we're going to put in!
foreach($a as $key => $count) {
foreach($count as $eventdetails['rfid_id'] => $event){
// so $key is the [rfid] key of the entry and $count is the count (all 1's?) in it
if (isset($rfid[$key])) {
$rfid[$key]+=$event;
}
else {
$rfid[$key]=$event;
}
}
}
Which outputs as follows :
Array
(
[0] => Array
(
[date] => 2020-09-17
[device] => 2
[time] => 15:51:37
[rfid] => 23641
[count] => 1
)
[1] => Array
(
[date] => 2020-09-17
[device] => 2
[time] => 15:52:20
[rfid] => 5609
[count] => 1
)
[2] => Array
(
[date] => 2020-09-17
[device] => 2
[time] => 15:53:23
[rfid] => 5609
[count] => 1
)
[3] => Array
(
[date] => 2020-09-17
[device] => 2
[time] => 16:02:44
[rfid] => 5609
[count] => 1
)
)
Array
(
[rfid_id] => Array
(
[23641] => 1
[5609] => 1
)
[dateinsert] => Array
(
[2020-09-17] => 1
)
)
Array
(
[rfid_id] => 2
[dateinsert] => 1
)
Ideally, I would like to achieve the following :
Array
(
[rfid_id] => Array
(
[23641] => 1
[5609] => 3
)
[dateinsert] => Array
(
[2020-09-17] => 1
)
)
or something to that effect, where I can look at the date, rfid codes and the time each was read on that date.

Answer 1

You simply missing the path in the assignment loop.
Same goes for rfid and date so I just explain on rfid.
You check the isset on one path but is not exist set on another - this cause the path to never exist - that why you keep getting 1's.
Look at:
foreach($events as $event){
if(isset($a[$event['rfid']])){
$a['rfid_id'][$event['rfid']]++;
} else {
$a['rfid_id'][$event['rfid']]=1;
}
}
Notice $a[$event['rfid']] is NOT the same as $a['rfid_id'][$event['rfid']].
You should change the if statement to be: if (isset($a['rfid_id'][$event['rfid']))