Split \n issue on PHP

Hello, I have a problem with splitting a table, I enter ean13 codes in a textarea with a line break, so I do a split in order to retrieve the EAN13 codes one by one, but it doesn’t seem be done.

https://intranet.paritys.com/visuelsEAN.php
exemple EAN13 :
9782848319735
8424917798751
8424917756195

Thanks for your help

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