trigger_error
(PHP 4 >= 4.0.1, PHP 5)
trigger_error — Generates a user-level error/warning/notice message
说明
bool trigger_error ( string $error_msg [, int $error_type = E_USER_NOTICE ] )Used to trigger a user error condition, it can be used by in conjunction with the built-in error handler, or with a user defined function that has been set as the new error handler (set_error_handler()).
This function is useful when you need to generate a particular response to an exception at runtime.
参数
- error_msg
-
The designated error message for this error. It's limited to 1024 characters in length. Any additional characters beyond 1024 will be truncated.
- error_type
-
The designated error type for this error. It only works with the E_USER family of constants, and will default to E_USER_NOTICE.
返回值
This function returns FALSE if wrong error_type is specified, TRUE otherwise.
范例
Example #1 trigger_error() example
See set_error_handler() for a more extensive example.
<?php
if ($divisor == 0) {
trigger_error("Cannot divide by zero", E_USER_ERROR);
}
?>
注释
WarningHTML entities in error_msg are not escaped. Use htmlentities() on the message if the error is to be displayed in a browser.
参见
- error_reporting() - Sets which PHP errors are reported
- set_error_handler() - Sets a user-defined error handler function
- restore_error_handler() - Restores the previous error handler function
- The error level constants
