上传包含50000条记录的CSV文件并将数据插入MySQL

I need to upload csv and import this data to MySQL table.

    public function insertData()
    {
        while (($column = fgetcsv($file, 10000, ",")) !== FALSE) {
            $query = "INSERT into deleted_users (email)
                   values ('" . $column[0] . "');                $query->execute();
                       }
}

Perhaps the fastest way to bulk load data from PHP into MySQL is to use the LOAD DATA tool, something like this:

$sql = "LOAD DATA LOCAL INFILE 'path/to/yourfile.csv'
    INTO TABLE deleted_users
    FIELDS TERMINATED BY ','
    OPTIONALLY ENCLOSED BY '\"' 
    LINES TERMINATED BY '
'
    (@col1)
    SET email = @col1;";
mysqli_query($conn, $sql);

This answer loads records with only the email field being assigned. If you want to assign a value for the id and type columns, then you will need a CSV file containing these values.