How to edit the specific rows in CSV file using PHP

[brin0522]

I have a CSV file that viewed in web using CSV reader-codeigniter without using database. The user can add another data in using web and directly save into CSV file using this code

$file = fopen("./bin/pdw_table.csv","a");
 
        foreach ($list as $line)
        {
            fputcsv($file,explode(',',$line));
        }
 
        fclose($file);

my problem now is how to edit and delete the existing data in CSV file. By the i'm using codeigniter here. I need your help. Thank you in advance for your answer :)