&reftitle.constants; &extension.constants; Constant Value Description FUNCTION_TRACE (integer) 1 ARGS_TRACE (integer) 2 ASSIGNMENT_TRACE (integer) 4 STATEMENT_TRACE (integer) 8 MEMORY_TRACE (integer) 16 TIMING_TRACE (integer) 32 SUMMARY_TRACE (integer) 64 ERROR_TRACE (integer) 128 PROF_TRACE (integer) 256 APD_VERSION (string) example: 1.0.2-dev