Question

I’m writing a web application where the user upload a zip file that contains properties files and images.

I want to validate that the properties files only contains ASCII characters. Is there a way in PHP to check the whole file and return an error if a non-ASCII character is found?

Thanks.

Answer 1

You can use:

• mb_detect_encoding():

  mb_detect_encoding(file_get_contents($filename), 'ASCII', true) === false
  

• A regular expression:

  preg_match('/^[\x20-\x7e]*$/', file_get_contents($filename)) > 0