Version 2.8 unreleased
Version 2.7 released 2020-04-03
Default to just api.yubico.com (now load balanced)
Retry transient errors
No longer support PHP 5.6 or HHVM (EOL 2018-12-31)
No longer support PHP 7.1 (EOL 2019-12-01)
Test with PHP 7.3 and 7.4
Version 2.6 released 2019-01-21
Compat changes for PHP 7.
Make https mandatory.
Version 2.5 released 2015-02-05
For httpsverify=false, set CURLOPT_SSL_VERIFYHOST to 0.
Support US Dvorak keyboard layout.
Cosmetic fixes of examples.
HTML escape variables to prevent XSS attacks in demos.
Version 2.4 released 2011-09-21
Fix PHP warnings. Tiny patch from Simon Buckle <simon.buckle@gmail.com>.
Version 2.3 released 2011-02-02
Fix PHP warnings. Tiny patch from Patrick MONNERAT <patrick.monnerat@datasphere.ch>.
Version 2.2 released 2010-11-04
Don’t use PHP 5.3 deprecated features.
Replace use of split with explode.
Replace use of &new with new.
Improve documentation.
Version 2.1 released 2010-04-26
Verify server certificates by default when HTTPS is requested.
New parameter to constructor to disable verification.
Improve last request/response messages, for debugging purposes.
Disable API input by default in demo.php.
API doc fixes.
Version 2.0 released 2010-04-23
Support for new replicated server protocol.
Version 1.9 released 2009-10-12
Version 1.8 released 2009-04
Version 1.7 released 2009-03
Version 1.6 released 2009-03
Version 1.5 released 2009-03
Version 1.4 released 2009-03
Version 1.3 released 2008-10
Version 1.2 released 2008-05
Version 1.1 released 2008-01