Final debugging and testing of PHP/TCPDF application

I have a completed PHP/TCPDF script working with WordPress that needs final debugging and testing before release. The script allows modification through overlay of text or image to uploaded PDF files. The script is installed on a Linus server. The following is the current list of defects I have found ... 1) Large files do not upload and do not load into the pdf_editor. I have successfully uploaded and edited a 14 page file, but a 52 page file does not upload and convert. My files will reach upwards of 400 pages. (2) Files which are deleted from the edit listing are left on the server. These need to be deleted to keep from using up server space. A function to delete the uploaded and edited files is needed in conjunction with the existing function to remove files from the listing. (3) The edit menu lists all pages in a document being edited. It is hard to tell what page I am working on when I am in a large file. I was editing the 14 page document, and lost track of what page I was editing. I would like some indicator of the page being edited, such as making the link for the current page larger or bold. (4) A link is needed that will save the document and navigate the user from the edit page to the admin page. (5) Many of the edited documents will have edited information copied from one page to the next. I need a function that will allow me to replicate a field on each page as n eeded. Something similar to a copy and paste function.