1. E_ERROR 1
  2. E_WARNING 2
  3. E_PARSE 4
  4. E_NOTICE 8
  5. E_CORE_ERROR 16
  6. E_CORE_WARNING 32
  7. E_COMPILE_ERROR 64
  8. E_COMPILE_WARNING 128
  9. E_USER_ERROR 256
  10. E_USER_WARNING 512
  11. E_USER_NOTICE 1024
  12. E_STRICT 2048
  13. E_RECOVERABLE_ERROR 4096
  14. E_DEPRECATED 8192
  15. E_USER_DEPRECATED 16384
  16. E_ALL 32767