Find the php.ini file and add extension='/absolute-path/bolt.so' in php.ini file. Then restart your server. Please choose correct bolt.so file. Bilt.so is diffrent for each version and OS.
Download sample encrypted php file for testing. It is “hello world” program.
Encryption key: kyc7fh
I added following code in mycode.php file.
<?php echo 'hello world';