(PHP 4 >= 4.0.1, PHP 5)
set_error_handler — Sets a user-defined error handler function
Sets a user function (error_handler ) to handle errors in a script.
This function can be used for defining your own way of handling errors during runtime, for example in applications in which you need to do cleanup of data/files when a critical error happens, or when you need to trigger an error under certain conditions (using trigger_error()).
It is important to remember that the standard PHP error handler is completely bypassed. error_reporting() settings will have no effect and your error handler will be called regardless - however you are still able to read the current value of error_reporting and act appropriately. Of particular note is that this value will be 0 if the statement that caused the error was prepended by the @ error-control operator.
Also note that it is your responsibility to die() if necessary. If the error-handler function returns, script execution will continue with the next statement after the one that caused an error.
The following error types cannot be handled with a user defined function: E_ERROR, E_PARSE, E_CORE_ERROR, E_CORE_WARNING, E_COMPILE_ERROR, E_COMPILE_WARNING, and most of E_STRICT raised in the file where set_error_handler() is called.
If errors occur before the script is executed (e.g. on file uploads) the custom error handler cannot be called since it is not registered at that time.
Returns a string containing the previously defined error handler (if any), or NULL on error. If the previous handler was a class method, this function will return an indexed array with the class and the method name.
Пример #1 Error handling with set_error_handler() and trigger_error()
The example below shows the handling of internal exceptions by triggering errors and handling them with a user defined function:
Результатом выполнения данного примера будет что-то подобное:
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