1$myfile = 'sample_csv.csv';
2
3$fin = fopen($myfile, 'r');
4$data = array();
5
6 /***********
7 * header row
8 */
9$data[] = fgetcsv($fin, 1000);
10 /***********
11 * data rows
12 */
13while ($line = fgetcsv($fin, 1000)) {
14 echo join(', ', $line).'<br>';
15 for($i = 4, $k = count($line); $i < $k; $i++) {
16 if ($line[$i] < 1000) {
17 $line[$i] = 10000;
18 }
19 }
20 $data[] = $line;
21}
22
23fclose($fin);
24 /******************
25 * reopen file and
26 * write array to file
27 */
28$fout = fopen($myfile, 'w');
29foreach ($data as $line) {
30 fputcsv($fout, $line);
31}
32fclose($fout);