Get array data and insert into database - arrays

Question

I'm trying to get the data in the array that came from another function(that function is extracting the data in the csv file) and when i tried calling the two fields from that array it shows an error that it is unidentified variables.
The $this->csv_process(); as shown on the function action() is the function that extracts the data from the csv file and stores it in an array which is successful since I tried checking it on var_dump();
I also named the two fields as $name and $email as shown below:
Function CSV_process()
public function csv_process()
{
/* variables for openning the csv file */
if (!in_array($extension, $allowed_ext)) {
$this->session->set_flashdata("message", "Sorry, CSV file only.");
} else {
if ($filesize > 0) {
$file = fopen($filename, "r");
$toWrite = array();
$error = false;
$col_size = 2;
$skip = 0;
while ($data = fgetcsv($file, 10000, ","))
{
$skip++;
if ($skip == 1) {
continue;
}
$numofcol = count($data);
if ($numofcol != $col_size ) {
$this->session->set_flashdata("message", "Column count exceeded or missing.");
} else {
$name1 = $data[0];
$name = str_replace("'", "''", $name1);
$email1 = $data[1];
$email = str_replace("'", "''", $email1);
$toWrite[] = [
'name' => $name,
'email' => $email
];
}
}
}
}
return $toWrite;
}
Function Action()
function action(){
$toWrite[] = $this->csv_process();
foreach ($toWrite as $arr) {
list($name, $email) = $arr;
//die(var_dump($arr));
$query = $this->db->query("SELECT * FROM import WHERE name ='$name' AND email = '$email'");
if ($query->num_rows() >= 1) {
} else {
if ($name == "" OR $email == "") {
} else {
if ((filter_var($email, FILTER_VALIDATE_EMAIL)) == FALSE ) {
} else {
$this->db->query("INSERT INTO import(name, email, created_date) VALUES('".$name."', '".$email."', '".date("Y-m-d h-i-s")."')");
$this->session->set_flashdata('message', 'SUCCESS YEAY');
redirect('Clean_csv/index');
}
}
}
$query->free_result();
}
}
Listing arrays doesn't seem to work for here, anyone knows how to extract the data array from $arr?

Answer 1

You don't need to extract the values. You can use each $arr in a bound query. It simplifies the syntax for the select query.
For inserting use CodeIgniter's insert() method. Again, the $arr can be used directly by adding the date to it before the insert is attempted.
I think this will work.
function action()
{
$toWrite[] = $this->csv_process();
foreach($toWrite as $arr)
{
$query = $this->db->query("SELECT * FROM import WHERE name=? AND email=?", $arr);
if($query->num_rows() >= 1)
{}
else
{
if($arr['name'] == "" OR $arr['email'] == "")
{}
else
{
if((filter_var($email, FILTER_VALIDATE_EMAIL)) == FALSE)
{}
else
{
$arr['created_date'] = date("Y-m-d h-i-s");
$this->db->insert("import", $arr);
$this->session->set_flashdata('message', 'SUCCESS YEAY');
//??? redirect('Clean_csv/index');
//Are you sure, you may still have more $arr in $toWrite to process - right?
}
}
}
$query->free_result();
}
}
You need to know what a terrible idea it is to repeatedly run database queries inside a loop. Even though you use free_result() it could be a massive drain on server resources. If your csv file has several thousand items you are severely stressing the database and the server.