note 112691 added to function.hash-pbkdf2

Sadly this function was added in PHP 5.5 but many webservers just provide PHP 5.3. But there exists a pure PHP implementation (found here: https://defuse.ca/php-pbkdf2.htm). I took this implementation, put it into a class with comments for PHPDoc and added a switch so that the native PHP function is used if available. Feel free to use it! http://pastebin.com/f5PDq735 (Posted on pastebin.com since the text would have been too long) ---- Server IP: 69.147.83.199 Probable Submitter: 134.28.202.206 ---- Manual Page -- http://php.net/manual/en/function.hash-pbkdf2.php Edit -- https://master.php.net/note/edit/112691 Del: integrated -- https://master.php.net/note/delete/112691/integrated Del: useless -- https://master.php.net/note/delete/112691/useless Del: bad code -- https://master.php.net/note/delete/112691/bad+code Del: spam -- https://master.php.net/note/delete/112691/spam Del: non-english -- https://master.php.net/note/delete/112691/non-english Del: in docs -- https://master.php.net/note/delete/112691/in+docs Del: other reasons-- https://master.php.net/note/delete/112691 Reject -- https://master.php.net/note/reject/112691 Search -- https://master.php.net/manage/user-notes.php