How to use php trigger_error function

php The trigger_error function is used to create user-defined error messages. Its syntax is trigger_error(error_message,error_types). The parameter error_message is required and refers to the specified error message. The length is limited to 1024 characters.

php How to use the trigger_error function?

Definition and usage

trigger_error( ) function creates a user-defined error message.

trigger_error() function is used to trigger an error message under user-specified conditions. It can be used with the built-in error handler, or with a user-defined function set by the set_error_handler() function.

This function is useful when you need to customize the error message under a specified condition when running the script.

If an illegal error type is specified, this function returns FALSE, otherwise it returns TRUE.

Syntax

trigger_error(error_message,error_types)

Parameters

error_message Required. Specifies the error message. Length limit is 1024 characters.

error_types Optional. Specifies the error type of the error message.

Possible error types:

E_USER_ERROR - User-generated fatal error at runtime. Unrecoverable error. Stop executing the script.

E_USER_WARNING - User-generated non-fatal warning at runtime. The script did not stop executing.

E_USER_NOTICE - Default. User-generated runtime notifications. Script discovery can be a bug, but can also occur when the script is running normally.

php trigger_error function usage example

<?php
$test=2;
if ($test>1)
{
trigger_error("A custom error has been triggered");
}
?>

The output of the above code is as follows:

Notice: A custom error has been triggered
in C:webfoldertest.php on line 6

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