How to edit a CSV file?

Question

PHP

Good afternoon!
I use the standard function for writing to CSV

$list = array(
        array('email', $dataS)
    );

    $fp = fopen('file.csv', 'w');

    foreach ($list as $fields) {
        fputcsv($fp, $fields);
    }

But as a result, new lines are not added, but the content is replaced. I sit probably the fourth hour.

Answer 1

You have chosen the wrong mode with which you open the file, see the documentation:
php.net/manual/en/function.fopen.php
you need to specify the mode a instead of w :
$fp = fopen('file.csv', 'a');

Answer 2

If you only need to append to a file, then open it with the a (append) parameter,
fopen('file.csv', 'a')

Answer 3

php.net/manual/ru/function.fopen.php read about the mode parameter.
If you want to add exactly to the end of the file, then change 'w' to 'a'.
If you need to change lines inside, you will have to move the pointer manually php.net/manual/en/function.fseek.php