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PHP trigger_error() Function


PHP Error Reference Complete PHP Error Reference

Definition and Usage

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

The trigger_error() function is used to trigger an error message at a user-specified condition. 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 a user-defined message to a specified condition when running a script runtime.

This function returns FALSE if a non valid error type is specified, and TRUE otherwise.

Syntax

trigger_error(error_message,error_types)

Parameter Description
error_message Required. Specifies the error message. Limited to 1024 characters in length
error_types Optional. Specifies the error type for this error message.

Possible error types:

  • E_USER_ERROR - Fatal user-generated run-time error. Errors that can not be recovered from. Execution of the script is halted
  • E_USER_WARNING - Non-fatal user-generated run-time warning. Execution of the script is not halted
  • E_USER_NOTICE - Default. User-generated run-time notice. The script found something that might be an error, but could also happen when running a script normally


Example

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

The output of the code above should be something like this:

Notice: A custom error has been triggered
in C:\webfolder\test.php on line 6


PHP Error Reference Complete PHP Error Reference

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