TCPDF | Official clone of PHP library | Document Editor library

Since URLs can point anywhere and that is not how pdfs are supposed to work, you have to embed your whole image by encoding it as base64

like this example here https://stackoverflow.com/a/8499716/5956589

TCPDF docs are huge but unusable – it's easier to read the source code directly. It has those extra headers because you're asking for them by using the E output mode, which is intended for generating email messages.

For sending the PDF data as a PHPMailer attachment, you want the straight binary PDF data as a string, as provided by the S output mode, which you can pass straight into addStringAttachment(), and PHPMailer will handle all the encoding for you. All you have to do is this:

Dont try to print unitless PDF to a thermal printer, you will be attempting to send a Page Language to an esc/POS rolling 203 DPI printer that has variable lengths by using a roll cutter. IF you must use PDF ensure the content is matched to the roll width and cut length (harder done than said) @ the correct pixel resolution in monochrome and you may still often get castellated aliased graphics.

Your key issue is the page is defined for that printout as 128 inches high (1 full page height = 1 roll length) thus you need a format and driver that is not designed for pages.

For the Zj printers there are Cups system alternate driver at https://github.com/futurelink/cups-thermo-printer or https://github.com/klirichek/zj-58 and the manufacturer supplies a multi windows version XP to 10 driver for use with the printer.

Normally I would recommend using SeaGull BarTender for Windows USB thermal printing but that model is not clearly supported https://www.seagullscientific.com/support/downloads/drivers/

Idealy you should use the printers own variant of esc/POS thermal language as instantly runs text or esc/POS binary through the port direct, not PDF through a much slower system driver with a PDF translation into monochrome escodes/text/bitmap stream for slow spooling. The printer stream will NOT be a %PDF- it will look at the start somthing like

You don't show the code you're using, but that string is a fragment of an email message, not a PDF binary PDF string as it should be.

Your code should be along the lines of (I don't remember tcpdf's syntax offhand):

You are not passing the variable to the PDF generator PHP file and also, in PDF generation file $row['id'] is not used, that is the reason you are getting the same data.

Change in few places will make things work as expected.

Pass the $row['id'] value to the php file.

You can use your loop with AddPage(); method like:

In comments we both went through possible reasons such as finding an absolute rather than relative location and checking out folder permissions for non admin process as that was also suspected. Thus between us the conclusion was:-

use address as

"localhost:8080/projects..."

and ensure target folder was set to permissions

"read/write" for all users

For production use the write access needs to be trimmed back to the process and admin, not all users.

Don't use relative paths for include. Relative paths have the "current working directory" as a reference. The working directory is not fixed and can also be changed by code. Always use the constant