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APD
PHP Manual

Predefined Constants

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.

APD 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  

APD
PHP Manual