Editing the Text file

[arpit_vavadia]

I have a text file which has the recrod(s) as follows
xx,xxx,xxx,xxx
xx,xxx,xx,xxx
xx,xxxx,xxxxx

Now how can I pick a particular row of data and edit and save it . So that when next when the record(s) are displayed the updated records as show

thank's

[NogDog]

One way:

$lines = file('file/to/be/edited.txt');
// loop through array $lines or otherwise manipulate it as desired, then...
file_put_contents('file/to/be/edited.txt', implode('', $lines));