1- fseek number not working

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maxmitch

$file = fopen("1stock.js", "c+");
  $number = fseek($file, 61, SEEK_CUR);
  fwrite($file, $number -1);

My 61st character is a number I want to do 1- that number. Why is this not working?

NogDog

fseek() does not return the character at that position, it just positions the file pointer to that position (if it succeeds) and then returns 0 on success or else -1 on failure. So after you position the pointer you then need to actually read what's at that position (e.g. fgetc(), perhaps?).

maxmitch

I tried this but it isn't working...

$file = fopen("1stock.js", "c+");
  $number = fseek($file, 61, SEEK_CUR);
  $fh = fgetc($number);
  fwrite($file, $fh -1);

NogDog

Try something like this to see if it works:

$file = fopen("1stock.js", "c+");
  $number = fseek($file, 61, SEEK_CUR);
  if($number == -1) {
    throw new Exception("fseek() failed!"); // or however else you want to handle this error
  }
  $fh = fgetc($file); // fgetc() needs a file handle, not the return code from fseek()
  print("DEBUG: Got this value from the file: $fh"); // or error_log(), or however you like to get debug info
  fwrite($file, $fh -1);

Also, I'm not sure if the fseek() position is zeroth based or not. If it is, then character 61 would be offset 60.