Count specific rows - php

Question

I am using bootstrap progress bar to display stats.
I want to know how many scored 10 points out of total no of rows.
$q="SELECT * FROM users";
$r = mysqli_query($con,$q);
$total = mysqli_num_rows($r);
Name email score time
Hello abc#gmail.com 10 15
Hello abc#gmail.com 58 10
Test def#gmail.com 10 12
Stack xyz#gmail.com 90 20
Test def#gmail.com 50 40

Answer 1

$q="SELECT COUNT(Name) FROM users WHERE score='10' ";

Answer 2

You can use this simple query to get it done :-
SELECT COUNT(name), score
FROM users
GROUP BY score
This would get the total for each individual score (10,9,8).
If you want total only for value 10. Use this instead.
SELECT COUNT(name), score
FROM users
WHERE score=10

Answer 3

This will loop through the $total array and assign all the values less than 10 into an array then loop through that array to print out how many out of total for each less than 10.
$total = [
0 => [
'name' => 'Hello',
'email' => 'abc#gmail.com',
'score' => 10,
'time' => 15
],
1 => [
'name' => 'Hello',
'email' => 'abc#gmail.com',
'score' => 58,
'time' => 10
],
2 => [
'name' => 'Test',
'email' => 'def#gmail.com',
'score' => 10,
'time' => 12
],
3 => [
'name' => 'Stack',
'email' => 'xyz#gmail.com',
'score' => 90,
'time' => 20
],
4 => [
'name' => 'Test',
'email' => 'def#gmail.com',
'score' => 50,
'time' => 40
],
];
$sizeOfArray = count($total);
$arrayOfScoresLessThanTen = [];
foreach($total as $value) {
if($value['score'] <= 10) {
if(isset($arrayOfScoresLessThanTen[$value['score']])) {
$arrayOfScoresLessThanTen[$value['score']] ++;
}
else {
$arrayOfScoresLessThanTen[$value['score']] = 1;
}
}
}
foreach($arrayOfScoresLessThanTen as $key => $scoresLessThanTen) {
echo 'Score: '. $key . ' number scored out of total: '. $scoresLessThanTen . '/'.$sizeOfArray;
}
This has been tested and works with the array $total that I created to match the one you had in your table. I added my $total array so that you can test it for yourself.