Count the number of dinner invitations that are in array - php

Question

I am using foreach loop that outputs an array
$dinnerDetails = array();
$lastDinnerDate = '';
$newDate = '';
foreach ($invitations as $invitation) {
$lastDinnerDate = $invitation['dinner_date'];
if ($invitation['dinner_date'] > $lastDinnerDate) {
$newDate = 'yes';
} else {
$newDate = 'no';
}
$dinnerDetails[] = array(
'request_id' => $invitation['request_id'],
'dinner_date' => $invitation['dinner_date'],
'dinner_id' => $invitation['dinner_id'],
'new_dinner' => $newDate
);
}
Output looks like this
array:4 [▼
0 => array:3 [▼
"request_id" => "48"
"dinner_id" => "36"
"dinner_date" => "2016-05-16T10:00:00"
"new_date" => "yes"
]
1 => array:3 [▼
"request_id" => "51"
"dinner_id" => "40"
"dinner_date" => "2016-05-16T10:00:00"
"new_date" => "no"
]
2 => array:3 [▼
"request_id" => "50"
"dinner_id" => "36"
"dinner_date" => "2016-05-27T10:00:00"
"new_date" => "yes"
]
3 => array:3 [▼
"request_id" => "52"
"dinner_id" => "41"
"dinner_date" => "2016-05-27T10:00:00"
"new_date" => "no"
]
]
My question is how can i count the number of times the dinner_id appeared. I would like to pass that value as part of the array because $dinnerDetails is being passed to the view so it will make it easier to display the count. The view already displays the data via foreach loop its only the count i need for each dinner_id

Answer 1

I assume you want to count the ID's and not the label / name itself, one ever so simple way would be doing it like so, simply place this inside of your foreach loop
$countDinner[$invitation['dinner_id']] = isset($countDinner[$invitation['dinner_id']]) ? $countDinner[$invitation['dinner_id']] + 1 : 1;
One coud also use a if clause instead of a ternary operator if one preffers, don't forget to place a
$countDinner = array();
Before the foreach loop to initialize the array, you should now have a array with the count of each dinner_id.
To add it to the existing array simply loop through as following:
foreach($dinnerDetails as &$dinnerDetail){
$dinnerDetail['count'] = $countDinner[$dinnerDetail['dinner_id']];
}
and the end result will look like this
0 => array:3 [▼
"request_id" => "48"
"dinner_id" => "36"
"dinner_date" => "2016-05-16T10:00:00"
"new_date" => "yes"
"count" => 2
]