[CLUG] TECH/PHP question

[Fixer]

I have a file on the filesystem with the following format:

name.jpg}caption1
name2.jpg}caption2
...
nameN.jpg}captionN

if you can guess, it's for an image gallery.  Appending new lines on a file
upload process is quite easy with fopen/fput.  The trick comes in when I have
multiple, say 10, images listed and now want to delete one or change the 
caption.
I am using php.

I can read the file into an array which leaves each line as an element in 
the array,
and if I for loop thru it, I can use list to make $filename and $caption 
variables.
Display of each in an html form is no problem.  I currently have a copy of the
thumbnail image, a text field with the caption and a "delete" checkbox.

The issue is how do I capture the new data for all 10 caption fields and then
edit the config file from earlier?  I haven't quite gotten my head wrapped 
around
multidimensional arrays, or even if they are appropriate for this.  I think 
I have
over thought it, so I am turning to others for a bit of inspiration.





--
fix.er \'fik-s*r\ n : one that fixes : as : one that intervenes to
    enable a person to circumvent the law or obtain a political
    favor : one that adjusts matters or disputes by negotiation