error_handling.md

Error handling

Predefined constants :

Default errors :

Value	Constant	Description
1	E_ERROR	Fatal run-time errors. Execution of the script is halt.
2	E_WARNING	Run-time warnings. Execution of the the script is not halted.
4	E_PARSE	Compile-time errors. Should only be generated by the parser.
8	E_NOTICE	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.

Core errors :

Value	Constant	Description
16	E_CORE_ERROR	Fatal errors that occur during PHP's initial startup. This is like an E_ERROR, except it is generated by the core of PHP.
32	E_CORE_WARNING	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.
64	E_COMPILE_CORE	Fatal compile-time errors. This is like an E_ERROR, except it is generated by the Zend Scripting Engine.
128	E_COMPILE_WARNING	Compile-time warnings (non-fatal errors). This is like E_WARNING but it is generated buy the Zend Engine.

User-generated errors :

Value	Constant	Description
256	E_USER_ERROR	User-generated error message. This is like an E_ERROR, except it is generated in PHP code by using the PHP function trigger_error().
512	E_USER_WARNING	User-generated warning message. This is like an E_WARNING, except it is generated in PHP code by using the PHP function trigger_error().
1024	E_USER_NOTICE	User-generated notice message. This is like an E_WARNING, except it is generated in PHP code by using the PHP function trigger_error().

Other errors :

Value	Constant	Description
2048	E_STRICT	Enable to have PHP suggest changes to your code wich will ensure the best interoperability and forward compatiblity of your code.
4096	E_RECOVERABLE_ERROR	Catchable fatal error. It indicates that a probably dangerous error occurred, 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.
8192	E_DEPRECATED	Run-time notices. Enable this to receive warnings about code that will not work in future versions.
16384	E_USER_DEPRECATED	User-generated warning message. This is like an E_DEPRECATED, except it is generated in PHP code by using the PHP function trigger_error().
2767	E_ALL	All errors and warnings, as supported, except of level E_STRICT.

⛔ E_STRICT with the value 2048 when enabled, messages will be issued to warn you about code usage which is deprecated or which may not be future-proof.
⛔ E_ALL does not include E_STRICT, so it's not enabled by default. You must explicitly set the error reporting level to include E_STRICT in order to see these messages.