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预定义常量
下列常量由此扩展定义，且仅在此扩展编译入 PHP 或在运行时动态载入时可用。
| 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 |