The UpperCase filter allows to change the content of a file to
uppercase. You should use this filter only on textfiles.
At initiation you can give a string which will then be used as encoding. Or you can use
the setEncoding() method to set it afterwards.
Example 424. Using the UpperCase filter
<?php
$upload = new Zend_File_Transfer_Adapter_Http();
$upload->addValidator('MimeType', 'text');
// Adds a filter to uppercase the uploaded textfile
$upload->addFilter('UpperCase');
// Adds a filter to uppercase the uploaded file but only for uploadfile1
$upload->addFilter('UpperCase', null, 'uploadfile1');
// Adds a filter to uppercase with encoding set to ISO-8859-1
$upload->addFilter('UpperCase', 'ISO-8859-1');
Note
Note that due to the fact that the options for the UpperCase filter are optional,
you must give a NULL as second parameter (the options) when you
want to limit it to a single file element.