The constants below are defined by this extension, and will only be available when the extension has either been compiled into PHP or dynamically loaded at runtime.
YAF_VERSION
     (string)
    YAF_ENVIRON
     (string)
    YAF_ERR_STARTUP_FAILED
     (integer)
    YAF_ERR_ROUTE_FAILED
     (integer)
    YAF_ERR_DISPATCH_FAILED
     (integer)
    YAF_ERR_AUTOLOAD_FAILED
     (integer)
    YAF_ERR_NOTFOUND_MODULE
     (integer)
    YAF_ERR_NOTFOUND_CONTROLLER
     (integer)
    YAF_ERR_NOTFOUND_ACTION
     (integer)
    YAF_ERR_NOTFOUND_VIEW
     (integer)
    YAF_ERR_CALL_FAILED
     (integer)
    YAF_ERR_TYPE_ERROR
     (integer)