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