Unable to determine file format .CSV

[tomswinkels]

Error with .csv file.

array:7 [
  "GETID3_VERSION" => "1.9.21-202109171300"
  "filesize" => 483
  "filepath" => "/tmp"
  "filename" => "php9xHIox"
  "filenamepath" => "/tmp/php9xHIox"
  "encoding" => "UTF-8"
  "error" => array:1 [
    0 => "unable to determine file format"
  ]
]

bak.csv

[JamesHeinrich]

Are you expecting getID3 to identify this bak.csv as a "CSV" file?
If so, that won't be implemented, CSV is just a text file that complies with certain formatting conventions, but there can be a huge number of variations on the general concept.