There are several types of errors and warnings in PHP. They are:
Table 15-1. PHP error types
| Value | Constant | Description | Note |
|---|---|---|---|
| 1 | E_ERROR | fatal run-time errors | |
| 2 | E_WARNING | run-time warnings (non fatal errors) | |
| 4 | E_PARSE | compile-time parse errors | |
| 8 | E_NOTICE | run-time notices (less serious than warnings) | |
| 16 | E_CORE_ERROR | fatal errors that occur during PHP's initial startup | PHP 4 only |
| 32 | E_CORE_WARNING | warnings (non fatal errors) that occur during PHP's initial startup | PHP 4 only |
| 64 | E_COMPILE_ERROR | fatal compile-time errors | PHP 4 only |
| 128 | E_COMPILE_WARNING | compile-time warnings (non fatal errors) | PHP 4 only |
| 256 | E_USER_ERROR | user-generated error message | PHP 4 only |
| 512 | E_USER_WARNING | user-generated warning message | PHP 4 only |
| 1024 | E_USER_NOTICE | user-generated notice message | PHP 4 only |