Scores per year in array - php

Question

Pretty new to PHP and i'm trying to achieve something, that in my opinion can be done easily in c#. However in PHP it isn't that easy to achieve for me.
When iterating over an XML file, I want to store all average scores per year.
The years will be unique, the scores should be their values.
Output should be like:
['2012'] => array(8.1, 7.3, 8.8)
['2013'] => array(6.7, 7.7, 5.5)
['2014'] => array(2.3, 7.9, 9.9)
This way I can get all average scores from the year 2014, etc.
In c# I would have created a Dictionary containing a List like:
var yearScores = new Dictionary<string, List<Decimal>>();
My current PHP code looks like:
$yearScores = array(array());
foreach($xml->results->children() as $result) {
//Reset variables
$current_date = null;
$current_average = null;
//Iterate over all 'answer' children in result
foreach($result->children() as $answer) {
//Retrieve Date and Average
if($average[0]['name'] == "date") {
$current_date = date('Y', strtotime($answer));
}
if($average[0]['name'] == "average") {
$current_average = $answer;
}
}
//Validate if we found both current Date and current Average
if(is_null($current_date) || is_null($current_average)) continue;
//The Date and Average exist
//See if the Datum already exists in our array
if(!in_array($current_date, $yearScores)) {
$yearScores[] = $current_date;
}
//The average should be added to the correct year in the array here.
}
How can I add the scores to the correct year arrays in the $yearScores array?

Answer 1

You can do it as follows:
// no need to initialize multidimensional array here
$yearScores = array();
foreach($xml->results->children() as $result) {
foreach($result->children() as $answer) {
//Retrieve Date and Average
// This here does not look right to me
if($average[0]['name'] == "date") {
$current_date = date('Y', strtotime($answer));
}
if($average[0]['name'] == "average") {
$current_average = $answer;
}
if(!isset($yearScores[$current_date])) {
$yearScores[$current_date] = array($current_average);
} else {
array_push($yearScores[$current_date], $current_average);
}
}
}
I am not sure about the ifs however (check my comment). Have you checked if their output is correct?