set of functions to do all these.

[kbrij]

I need the set of functions to do all these step by step.
Rest of the stuff i will manage to do it, logic etc.

1. A directory on Linux contains only ASCII text file.
2. The PHP script should search for a combination word in these files (input from another script)
3. if found should delete the line and replace it with what I select from a drop-down-box(HTML-Select)
4. Save the file or files it changed.

Is these all possible thru PHP's functions or i have to rely on Unix 'sed' command ?

Can someone please just jot down the possible functions to use for above 4 tasks.

Thank you for the help.
kbrij.

[Hafkas]

for the text searching replacing check out the string functions...
http://www.php.net/manual/en/ref.strings.php

for the file/directory handling functions read this section...
http://www.php.net/manual/en/ref.filesystem.php

also note that the directory that you are modifying text files in will need to allow write access for the web server user.