Counting unserialized array grouped by index - php

Question

I have a serialized array in my database that I have extracted and unserialized. It has a structure like this:
array (
526744 =>
array (
'completed' => 13,
'total' => 24,
'topics' =>
array (
),
'lessons' =>
array (
526745 => 1,
526747 => 1,
526749 => 1,
526751 => 0,
526753 => 0,
526755 => 0,
526757 => 0,
526759 => 0,
526761 => 1,
),
'last_id' => 526793,
)
The first number is a course id (there are actually 3 courses I've just included the first here).
I have pulled this out of the database for several different users, so I have the above several times over.
I am trying to count the lessons, so that I know how many users have passed each lesson.
I have the following code:
foreach($results as $result) {
$course_progress = unserialize($result->course_progress);
$lesson_progress = $course_progress[$course_id][lessons];
print_r(array_count_values($lesson_progress));
}
This outputs this:
Array ( [1] => 24 )
Array ( [1] => 11 [0] => 13 )
Array ( [1] => 13 [0] => 11 )
Array ( [1] => 24 )
Array ( [1] => 24 )
Array ( [1] => 24 )
Array ( [1] => 24 )
Array ( [1] => 23 [0] => 1 )
Array ( [1] => 24 )
Array ( [1] => 21 [0] => 3 )
Array ( [1] => 24 )
Array ( [1] => 24 )
Array ( [1] => 24 )
Array ( [1] => 24 )
Array ( [0] => 21 [1] => 3 )
This is obviously completely wrong. But I cannot think of how to get it to work. I think the issue is that I have a separate array for each user with my current code maybe?
Any help would be greatly appreciated.

Answer 1

Attempt 4:
$users = array(
'john' => array(
526744 => array (
'completed' => 13,
'total' => 24,
'topics' =>
array (),
'lessons' =>
array (
526745 => 1,
526747 => 1,
526749 => 1,
526751 => 0,
526753 => 0,
526755 => 0,
526757 => 0,
526759 => 0,
526761 => 1,
),
'last_id' => 526793,
),
526745 => array (
'completed' => 13,
'total' => 24,
'topics' =>
array (),
'lessons' =>
array (
526745 => 1,
526747 => 1,
526749 => 1,
526751 => 0,
526753 => 1,
526755 => 0,
526757 => 0,
526759 => 0,
526761 => 1,
),
'last_id' => 526793,
),
),
'joe' => array(
526744 => array (
'completed' => 13,
'total' => 24,
'topics' =>
array (),
'lessons' =>
array (
526745 => 1,
526747 => 1,
526749 => 1,
526751 => 0,
526753 => 0,
526755 => 0,
526757 => 0,
526759 => 0,
526761 => 1,
),
'last_id' => 526793,
),
526745 => array (
'completed' => 13,
'total' => 24,
'topics' =>
array (),
'lessons' =>
array (
526745 => 1,
526747 => 1,
526749 => 1,
526751 => 1,
526753 => 1,
526755 => 0,
526757 => 0,
526759 => 0,
526761 => 1,
),
'last_id' => 526793,
),
)
);
$counts = [];
foreach($users as $userId => $userCourses){
foreach($userCourses as $courseId => $course){
foreach($course['lessons'] as $lessonId => $lesson){
$counts[$courseId][$lessonId] = empty($counts[$courseId][$lessonId]) ? $lesson : $counts[$courseId][$lessonId]+$lesson;
}
}
}
var_dump($counts);
Obviously My array keys (john and joe) are just for testing purposes so the outermost foreach is negligible.
Returns:
array (size=2)
526744 =>
array (size=9)
526745 => int 2
526747 => int 2
526749 => int 2
526751 => int 0
526753 => int 0
526755 => int 0
526757 => int 0
526759 => int 0
526761 => int 2
526745 =>
array (size=9)
526745 => int 2
526747 => int 2
526749 => int 2
526751 => int 1
526753 => int 2
526755 => int 0
526757 => int 0
526759 => int 0
526761 => int 2