Update Abstract.php

[michaelhettwer]

Fix problem with duplicate header lines -> Mass Printing PDF
SolutioN: Empty array after generating each header

[Schrank]

Thanks for your PR! May you please add a PDF/Screenshot or steps how to reproduce the problem? I don't understand what you want to fix :-)

[michaelhettwer]

Hey Fabian

after selecting more than one invoices and select print invoices the generated pdf files includes duplicate header lines.

Invoice-Nr, Customer Nr and Vat ID are included in the first pdf: 1 time
in the second: 2 times
in the third: 3 times

after empty the array the issue is fixed :-)

best

michael

[sprankhub]

Thanks.

_headerLines is an array. You set it to an empty string. It should probably be set to array().

[michaelhettwer]

Of course, it should be. Thanks ;-)

[Schrank]

Thanks, I'll fix that. But I prefer to reset the headerLines on loop start :-)

[michaelhettwer]

Yeah, of course. Array() and on Loop start. Sorry for quick dirt fixing ;-)

[Schrank]

Thanks for bringing it up! <3