The error_reporting directive in php.ini defines the levels of errors that PHP will report, the levels of errors are:
| Value | Constant | Description | Note |
|---|---|---|---|
| 1 | E_ERROR (integer) | Fatal run-time errors. These indicate errors that can not be recovered from, such as a memory allocation problem. Execution of the script is halted. | |
| 2 | E_WARNING (integer) | Run-time warnings (non-fatal errors). Execution of the script is not halted. | |
| 4 | E_PARSE (integer) | Compile-time parse errors. Parse errors should only be generated by the parser. | |
| 8 | E_NOTICE (integer) | Run-time notices. Indicate that the script encountered something that could indicate an error, but could also happen in the normal course of running a script. | |
| 16 | E_CORE_ERROR (integer) | Fatal errors that occur during PHP's initial startup. This is like an E_ERROR, except it is generated by the core of PHP. | since PHP 4 |
| 32 | E_CORE_WARNING(integer) | Warnings (non-fatal errors) that occur during PHP's initial startup. This is like an E_WARNING, except it is generated by the core of PHP. | since PHP 4 |
| 64 | E_COMPILE_ERROR(integer) | Fatal compile-time errors. This is like an E_ERROR, except it is generated by the Zend Scripting Engine. | since PHP 4 |
| 128 | E_COMPILE_WARNING(integer) | Compile-time warnings (non-fatal errors). This is like an E_WARNING, except it is generated by the Zend Scripting Engine. | since PHP 4 |
| 256 | E_USER_ERROR (integer) | User-generated error message. This is like an E_ERROR, except it is generated in PHP code by using the PHP function trigger_error(). | since PHP 4 |
| 512 | E_USER_WARNING(integer) | User-generated warning message. This is like an E_WARNING, except it is generated in PHP code by using the PHP functiontrigger_error(). | since PHP 4 |
| 1024 | E_USER_NOTICE (integer) | User-generated notice message. This is like an E_NOTICE, except it is generated in PHP code by using the PHP function trigger_error(). | since PHP 4 |
| 2048 | E_STRICT (integer) | Run-time notices. Enable to have PHP suggest changes to your code which will ensure the best interoperability and forward compatibility of your code. | since PHP 5 |
| 4096 | E_RECOVERABLE_ERROR(integer) | Catchable fatal error. It indicates that a probably dangerous error occured, but did not leave the Engine in an unstable state. If the error is not caught by a user defined handle (see also set_error_handler()), the application aborts as it was an E_ERROR. | since PHP 5.2.0 |
| 8191 | E_ALL (integer) | All errors and warnings, as supported, except of level E_STRICT in PHP < 6. | 6143 in PHP 5.2.x and 2047 previously |