Use LevelDB in PHP code

As we all know, LevelDB is only a C/C ++ programming language library, so PHP cannot directly use LevelDB. if the PHP project wants to use LevelDB, one method is to develop it in C language, encapsulate LevelDB into a module of PHP, And the other method is to encapsulate LevelDB into a network server. the LevelDB module for PHP development is not highly applicable, because this mode limits that it must be stored on a single machine and must be on the same machine as PHP. with the principle of code and data separation, it is better to encapsulate LevelDB into a network service. SSDB is a LevelDB Server. It uses LevelDB as the storage engine and supports clients such as PHP, Java, Python, C, and C ++. the following is an example of connecting PHP to SSDB, that is, using LevelDB in PHP: <? Phprequire_once ('ssdb. php '); $ ssdb = new SSDB ('2017. 0.0.1 ', 8888); $ resp = $ ssdb-> set ('key', '000000'); $ resp = $ ssdb-> get ('key '); echo $ resp-> data; // output: 123 for the complete API, see the SSDB project Wiki.