PHP Split CSV file and update to Database doesn't work - php

Question

I would like to split a very large CSV file (20 000 lines) to be able to put everything in my MySQL database (after I use cronjob for load the php file every hours).
So I have found code to split my file :
$inputFile = 'Shipping.csv';
$outputFile = 'output';
$splitSize = 1000;
$in = fopen($inputFile, 'r');
$rowCount = 0;
$fileCount = 1;
while (!feof($in)) {
if (($rowCount % $splitSize) == 0) {
if ($rowCount > 0) {
fclose($out);
}
$out = fopen($outputFile . $fileCount++ . '.csv', 'w');
}
$data = fgetcsv($in);
if ($data)
fputcsv($out, $data);
$rowCount++;
}
fclose($out);
I have tried to do this but they don't work :
require_once dirname(__DIR__).'/pdo.php';
$inputFile = 'Shipping.csv';
$outputFile = 'output';
$splitSize = 1000;
//open uploaded csv file with read only mode
$in = fopen($inputFile, 'r');
//skip first line
fgetcsv($in);
$rowCount = 0;
$fileCount = 1;
while (!feof($in)) {
if (($rowCount % $splitSize) == 0) {
if ($rowCount > 0) {
fclose($out);
}
$out = fopen($outputFile . $fileCount++ . '.csv', 'w');
}
$data = fgetcsv($in);
if ($data){
fputcsv($out, $data);
}
while(($line = fgetcsv($out)) !== FALSE){
//check whether member already exists in database with same email
$prevQuery = "SELECT id FROM shipbp WHERE license = '".$line[1]."'";
$prevResult = $bdd->query($prevQuery);
if($prevResult->rowCount() > 0)
{
$bdd->query("UPDATE shipbp SET license = '".$line[0]."'");
}
else{
$bdd->query("INSERT INTO shipbp (license) VALUES ('".$line[0]."')");
}
}
$rowCount++;
}
fclose($out);
CSV file look like :
P135460,002,00003,250,AS44563,0.35,,Blabla,17/3/2017 00:00:00,SB,Blabla
How I can do ?
Thank you for your help