[newbie] easy question about fopen ("$filename", "r+")

Hi, If I load e.g. textfile.txt with the file pointer at the beginning of the file and write a line or two into it, does it always overwrite the first lines? Is there any function that *always* moves the old lines down automatically? Regards, Sumarlidi Einar Dadason SED - Graphic Design ------------------------------------------ Phone: (+354) 4615501 Mobile: (+354) 8960376 Fax: (+354) 4615503 E-mail: sed@sed.is Homepage: www.sed.is <- New Homepage! ------------------------------------------