re:Incremnting a number in a file

Hi all, I am having a problem trying to open, read then write an incremented number into a file. here is the simplistic code I have so far: The file txndata has already been created and is in /tmp it is readable and writeable by user/group nobody:nobody and others, it has the value of 0 inside of it. <?php $tdata = "/tmp/txndata"; $fo = fopen("$tdata","w+"); $fr = fread($fo, filesize($tdata)); $fi = $fr++; $fw = fwrite($fo,$fi); fclose($fo); echo "Number = $fi"; ?> It returns Number = It seems to wipe out the 0 in the file, Is this because $fr does not actually return the contents of the file it always seems to equal 1 ? If that is true then how do I read the contents of a file into a string? This has me stumped I have also tried this various ways I must be missing something or have the totally wrong idea how this works. Any help much appreciated, Joseph H Blythe Boldweb Internet / Binary Logic 257 Churchill Road Prospect, Adelaide South Australia 5082 PH: 08 8342 0022 FAX: 08 8342 0155 mailto:webdevel@binarylogic.com.au