PHP joining row from database - php

Question

I need an advice how to display data from array (result of sql query) in PHP.
Here's the problem:
My query result is 2 row (top figure). Currently, I'm using foreach method to display all data, thus, the foreach will iterate 2 times, right?
Now, I want to ask:
In my web page, how I can display like the bottom figure??
How to join the second row (the theory's score is 0, and the lab's score is 75 and 80) to the first row? So it'll be ONLY 1 row for ID 112.
EDIT:
The SQL query is not my part. I've just received that data (top figure), and my job only to display it to web page.

Answer 1

Well as you used to display rows with foreach you could do it the same way:
* create new array
* loop through your current array
* save to new array by ID and do SUMs
* you can do output from newly created array.

Answer 2

create new array by loop through your current array which will filter out 0 values probably by using array_walk_recursive() or array_map() or array_filter()
then at this stage you got filtered array
you can do output from filtered array

Answer 3

I'm wondering why you have two rows with same 'id'. Usually 'id' should be the primary key...
Anyway, you could simply combine the rows with same 'id', adding the equally named fields casting them like integers.
EDIT 1-2:
Supposing code is in associative arrays:
$rows = array(
0 => array(
'id' => 112,
'theory' => array('score1' => 70, 'score2' => 80),
'lab' => array('score1' => 0, 'score2' => 0)
),
1 => array(
'id' => 112,
'theory' => array('score1' => 0, 'score2' => 0),
'lab' => array('score1' => 75, 'score2' => 80)
),
2 => array(
'id' => 110,
'theory' => array('score1' => 0, 'score2' => 0),
'lab' => array('score1' => 75, 'score2' => 80)
)
);
// New buffer for data
$newArray = array();
// Loop to combine buffer
foreach ($rows as $row) {
if (array_key_exists($row['id'], $newArray))
{
$newArray[$row['id']]['theory']['score1'] += $row['theory']['score1'];
$newArray[$row['id']]['theory']['score2'] += $row['theory']['score2'];
$newArray[$row['id']]['lab']['score1'] += $row['lab']['score1'];
$newArray[$row['id']]['lab']['score2'] += $row['lab']['score2'];
} else {
$newArray[$row['id']]['theory']['score1'] = $row['theory']['score1'];
$newArray[$row['id']]['theory']['score2'] = $row['theory']['score2'];
$newArray[$row['id']]['lab']['score1'] = $row['lab']['score1'];
$newArray[$row['id']]['lab']['score2'] = $row['lab']['score2'];
}
}
// Loop to show data
foreach ($newArray as $key => $value) {
echo $key." ".$value['theory']['score1']." ".$value['theory']['score2']." ".$value['lab']['score1']." ".$value['lab']['score2']."\n";
}
Output:
112 70 80 75 80
110 0 0 75 80

Answer 4

Let's say that you receive your data as Arrays:
$data=array();
$data[0]=[112,70,80,0,0];
$data[1]=[112,0,0,75,80];
$data[2]=[113,71,81,0,0];
$data[3]=[113,0,0,76,81];
If you know in advance that each ID will have exactly two records:
echo '<table>';
echo '<thead>';
echo '<tr>';
echo '<th rowspan="2">ID</th><th colspan="2">theory</th><th colspan="2">lab</th>';
echo '</tr>';
echo '<tr>';
echo '<th>score1</th><th>score2</th><th>score1</th><th>score2</th>';
echo '</tr>';
echo '</thead>';
echo '<tbody>';
for($i=0;$i<count($data);$i++)
{
$d=$data[$i];
echo '<tr>';
echo '<td>'.$d[0].'</td>'; //ID
echo '<td>'.$d[1].'</td><td>'.$d[2].'</td>';
$d=$data[++$i]; //take next element from array
echo '<td>'.$d[3].'</td><td>'.$d[4].'</td>';
echo '</tr>';
}
echo '</tbody>';
echo '</table>';
Code on PHPfiddle.
But generally, your SQL query should be changed in order to represent pivoted data and then you will not have this issue. However, you emphasized that this is out of your power.