Reading and writing to a flat file

[Anon]

I'm having a problem reading and writing to a flat file from a single file pointer. I open the pile with fopen($file_path, "r+");
then I read the file extract a number from the last line of the file increment the number by one and add a new line to the end of the file. When I do this the entire file is duplicated -- the behavior is the same if I open the file with an a+ flag.

Has anybody had any experience with this?

[Anon]

i don't use flat files often anymore but my experience in the past with them is this:

when you want to add a line to the end of a file (or beginning or middle or whatever) you have to read the file and pull the contents into a variable, add your line, then write it back into the file again. i don't think you can just open a file and add one line and close it.

[Anon]

Actually, when using flat files, you can open the file with a standard fopen. In the parenthetical statement after the name of the file, you would then put the designation of your action in quotes and close the parenthetical. The designation to add a line at the end of a file is "a" for append. Others include "r" for read, "w" for write and so forth (Check file modes for a complete listing). The statement would look like this: $fp=fopen("filename.ext","a"); where $fp is the file pointer.

Now, after this, you would make your statement for the appends using fwrite (EX. fwrite($fp,string_to_add));and then you would close the file with fclose (EX. fclose($fp)).