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Reporting Errors
To report errors from an internal function, you should call the php3_error() function. This takes at least two parameters -- the first is the level of the error, the second is the format string for the error message (as in a standard printf() call), and any following arguments are the parameters for the format string. The error levels are:
E_NOTICE
Notices are not printed by default, and indicate that the script encountered something that could indicate an error, but could also happen in the normal course of running a script. For example, trying to access the value of a variable which has not been set, or calling stat() on a file that doesn't exist.
E_WARNING
Warnings are printed by default, but do not interrupt script execution. These indicate a problem that should have been trapped by the script before the call was made. For example, calling ereg() with an invalid regular expression.
E_ERROR
Errors are also printed by default, and execution of the script is halted after the function returns. These indicate errors that can not be recovered from, such as a memory allocation problem.
E_PARSE
Parse errors should only be generated by the parser. The code is listed here only for the sake of completeness.
E_CORE_ERROR
This is like an E_ERROR, except it is generated by the core of PHP. Functions should not generate this type of error.
E_CORE_WARNING
This is like an E_WARNING, except it is generated by the core of PHP. Functions should not generate this type of error.
E_COMPILE_ERROR
This is like an E_ERROR, except it is generated by the Zend Scripting Engine. Functions should not generate this type of error.
E_COMPILE_WARNING
This is like an E_WARNING, except it is generated by the Zend Scripting Engine. Functions should not generate this type of error.
E_USER_ERROR
This is like an E_ERROR, except it is generated in PHP code by using the PHP function trigger_error(). Functions should not generate this type of error.
E_USER_WARNING
This is like an E_WARNING, except it is generated by using the PHP function trigger_error(). Functions should not generate this type of error.
E_USER_NOTICE
This is like an E_NOTICE, except it is generated by using the PHP function trigger_error(). Functions should not generate this type of error.
E_ALL
All of the above. Using this error_reporting level will show all error types.
| Poprzedni | Spis treści | Następny |
| Calling User Functions | Początek rozdziału | Configure options |
Język PHP to dzisiaj powszechnie przyjęty standard, podstawa tworzenia dynamicznych stron WWW, opartych na bazach danych.
PHP to język skryptowy. Znaczy to, że jest to język nie kompilowalny. Program jest wykonywany przez interpreter na podstawie jego kodu źródłowego. Język PHP to element technologii internetowej SERVER-SIDE. Znaczy to, że kod języka jest wykonywany od strony serwera (na serwerze).
W jakim celu używac PHP? Po co to komu?
Załóżmy, że potrzebujemy takiej strony internetowej, która wyświetli zawsze bieżącą datę. Dzięki technologii PHP, datę i godzinę odczytywać można z miejsca gdzie wykonuje się skrypt, np. gdy serwer znajduje się w USA a my w Polsce to widoczna jest różnica w czasie który zostanie wyświetlony.
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