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Usage and example of PHP trigger_error() function

The trigger_error() function generates a user-level error/Warning/Notice information

Syntax

bool trigger_error ( string $error_msg [, int $error_type] );

Definition and usage

This function is used to trigger user error conditions and can be used with built-in error handlers or user-defined functions set as new error handlers (set_error_handler()).

Parameter

Serial number	Parameters and descriptions
1	error_msg (required) The specific error information of this error, the length is limited to 1024 bytes. Over 1024 Characters in bytes will be truncated.
2	error_types (optional) It specifies the error type of this error message. Possible error types- E_USER_ERROR - User-generated fatal runtime errors. Errors that cannot be recovered from. The script execution is paused. E_USER_WARNING - User-generated non-fatal runtime warnings. The script execution will not stop. E_USER_NOTICE - Default. User-generated runtime notifications. The script may detect errors, but this may also happen during normal script execution.

Return value

If the specified error_type is incorrect, this function returns FALSE, otherwise it returns TRUE.

Online example

The following is the usage of the trigger_error function-

Example

<?php
　if ($test<10) {
　　　　trigger_error("The number cannot be less than10");
}
?>

Test and see‹/›

Output result:

The number cannot be less than10

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