PHP - fputcsv: put JSON values retrieved from MySQL field in separate columns - php

Question

I have a MySQL column that holds a JSON string of question numbers (0-165) as a key and question answers (score of 1-5) as a value. I need to retrieve all of the MySQL columns, put them into a .csv file with the JSON values in separate columns.
So far, I have a working PHP function that outputs the entirety of my MySQL table to an CSV file using fputcsv(). Here is the code:
function buildcsv(){
$start = $_POST['start'];
$end = $_POST['end'];
$result = mysql_query('SELECT fullname, institution, email, timestamp, responsesJSON
FROM `members` WHERE timestamp BETWEEN "'.$start.'" AND "'.$end.'"');
if (!$result) die('Couldn\'t fetch records');
ob_start();
$fp = fopen('php://output', 'w');
if ($fp && $result) {
while ($row = mysql_fetch_row($result)) {
fputcsv($fp, array_values($row));
}
fclose($fp);
return ob_get_clean();
}else{
$error = "Error. Either there is no data or invalid date.";
return $error;
}
}
And here is the output from the code:
However, I need my CSV output to resemble the following mockup:
Is it possible to do this without changing my database structure? I have seen code on stackoverflow that puts JSON values into separate columns, but how would I integrate it into my existing code which retrieves all other MySQL columns?
Thank you all in advance.

Answer 1

Try this way
while ($row = mysql_fetch_row($result)) {
$marks = json_decode($row['responsesJSON'],true);
unset($row['responsesJSON']);
fputcsv($fp, array_merge(array_values($row),array_values($marks)));
}
That is not best solution, but just food for thought and point to start.
Hope it could help

Answer 2

Much thanks to #KimAlexander and #RocketHazmat's suggestions, I figured it out:
function buildcsv(){
$start = $_POST['start'];
$end = $_POST['end'];
$result = mysql_query('SELECT fullname, institution, email, timestamp, responsesJSON
FROM `members` WHERE timestamp BETWEEN "'.$start.'" AND "'.$end.'"');
if (!$result) die('Couldn\'t fetch records');
ob_start();
$fp = fopen('php://output', 'a');
if ($fp && $result) {
while ($row = mysql_fetch_assoc($result)) {
$personal = array($row['fullname'], $row['institution'], $row['email'], $row['timestamp']);
$scores = json_decode($row['responsesJSON'], true);
fputcsv($fp, array_merge($personal, $scores));
}
fclose($fp);
return ob_get_clean();
}else{
$error = "Error. Either there is no data or invalid date.";
return $error;
}
}