Generate multiple CSV files - mysql PHP - php

Question

I have made this PHP script that should take an array and for each element in the array - generate a csv file. Unfortunately something is wrong. It doesn't store any of the files in the directory specified. But it doesn't return any errors neither. Maybe someone can see the problem?
$ids = json_decode($_POST['jsonarray']); // array sent with ajax
$start = $_POST['start']; // date sent with ajax
$end = $_POST['end']; // date sent with ajax
$start_date = date('yyyy-mm-dd', strtotime($start)); // format dates to sql firendly
$end_date = date('yyyy-mm-dd', strtotime($end));
$toZip = array(); // Prepare array to files for zip
if(is_array($ids)) {
foreach ($ids as $key => $qr)
{
// Get labels first
// Here we prepare the first line in the .CSV file
$tb = $qr . '_labels';
$sql = $user_pdo->query("SELECT * FROM $tb");
$head_array = array('Log ID', 'Timestamp');
while ($row = $sql->fetch(PDO::FETCH_ASSOC))
{
// This array is the first line in the .CSV file
$head_array[] = $row['label'];
}
// Get ready for looping through the database
$table = $qr . '_data';
$results = $user_pdo->prepare("SELECT * FROM $table WHERE timestamp BETWEEN :start_date AND :end_date;");
$results->bindParam(':start_date', $start_date, PDO::PARAM_STR);
$results->bindParam(':end_date', $$end_date, PDO::PARAM_STR);
$results->execute();
// Pick a filename and destination directory for the file
$filename = "temp/db_user_export_".time().".csv";
// Actually create the file
// The w+ parameter will wipe out and overwrite any existing file with the same name
$handle = fopen($filename, 'w+');
// Write the spreadsheet column titles / labels
fputcsv($handle, $head_array);
// Write all the user records to the spreadsheet
foreach($results as $row)
{
// amount of rows is unknown
$rows = $row->rowCount();
$insert_array = array();
for ($i=0; $i<=$rows; $i++)
{
// function goes here
$insert_array[] = $row[$i];
}
fputcsv($handle, $insert_array);
}
// Finish writing the file
fclose($handle);
$toZip[] = $filename;
}
}
Example on var_dump($ids);
array(4) {
[0]=>
string(5) "t23ry"
[1]=>
string(5) "6us32"
[2]=>
string(5) "se43z"
[3]=>
string(5) "o00gq"
}

Answer 1

I found the answer. After a long time searching and playing around, I saw that this function
foreach($results as $row)
{
// amount of rows is unknown
$rows = $row->rowCount();
$insert_array = array();
for ($i=0; $i<=$rows; $i++)
{
// function goes here
$insert_array[] = $row[$i];
}
fputcsv($handle, $insert_array);
}
didn't work because of following:
$rows = $row->rowCount(); has to be $rows = count($row);
The number of string in the returned $row array was higher than expected so I needed to change my select statement to $results = $user_pdo->query("SELECT * FROM $table WHERE timestamp >= '$start' AND timestamp <= '$end'";, PDO::FETCH_NUM);. This will only give me the rows in numeric order, which will make the $row[$i] -> array work.
Also as you can see, I changed the prepared statement to a query instead, and also changes the start date and end date variables to be unformatted.
This really took some time, but it is finally working. Thanks a lot for all the support guys.

Answer 2

fputcsv only outputs a line at a time. Change this:
for ($i=0; $i<=$rows; $i++)
{
// function goes here
$insert_array[] = $row[$i];
}
fputcsv($handle, $insert_array);
To this:
for ($i=0; $i<=$rows; $i++)
{
// function goes here
fputcsv($handle, $row[$i]);
}