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...The main implementation priority is ubiquitousness. To that effect, the server is implemented in PHP with few external dependencies to ensure that this can be run on even the leanest of web hosts.
The project includes the related tools from FreeMarker templates (used to generate RPC glue code) to the PHP "compiler" (static inlining of PHP includes in order to reduce runtime search overhead).
The PRAjax class can be used to reflect PHP code into JavaScript and Ajax methods and vice-versa. PHP objects can be used in JavaScript trough Ajax calls, both properties and (registered) functions.