|
|
 |
XXVII. Error Handling and Logging Functions
These are functions dealing with error handling and logging. They
allow you to define your own error handling rules, as well as modify
the way the errors can be logged. This allows you to change and
enhance error reporting to suit your needs.
With the logging functions, you can send messages directly to other
machines, to an email (or email to pager gateway!), to system logs,
etc., so you can selectively log and monitor the most important parts
of your applications and websites.
The error reporting functions allow you to customize what level and
kind of error feedback is given, ranging from simple notices to customized
functions returned during errors.
These functions are available as part of the
standard module, which is always available. There is no installation needed to use these
functions, they are part of the PHP core.
These constants are part of the PHP core and always available.
Taulu 1. Errors and Logging | Value | Constant | Description |
|---|
| 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.
| | 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. PHP 4 only.
| | 64 |
E_COMPILE_ERROR
(integer)
|
Fatal compile-time errors. This is like an E_ERROR,
except it is generated by the Zend Scripting Engine. PHP 4 only.
| | 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. PHP 4 only.
| | 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().
PHP 4 only.
| | 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 function trigger_error().
PHP 4 only.
| | 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().
PHP 4 only.
| | 2047 |
E_ALL
(integer)
|
All errors and warnings, as supported.
|
User Contributed Notes
Error Handling and Logging Functions |
  |
28-Aug-2001 03:20 |
|
Error Handling :
|
|
11-Jan-2002 02:03 |
|
A handy errorhandler class can be found at:
It has several enhancements (report layouts):
* prints the source code fragment where the error encountered,
* prints variable context around error source,
* suppresses error-messages, instead displays an arbitrary HTML or PHP
page
* logging to multiple targets and autodetecting target logging
* error messages can be displayed in a separate browser window
* catching errors for runtime generated codes
* debugging variables.
|
|
|
|
| |
dotnet_load