<br> appear in Text file

Dear all I'm writing a script which will greb the data from a user input form into a text file (txt file), but the problem is that when the data had passed to the txt file, there will be some thing like the <br> and black square appear inside the file. This is affecting to display the data from that txt file to the text box in (input box). Is there anyway that i can do to avoid grebing the <br> from txt file to my input box's value? or anyway that i can delete the <br> when the data is greb from input box to txt file?? Thanks a lot Jack jack@nedcor.com