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PHP - Function trigger_error()

Syntax

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

Definition and Usage

This function is 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()).

Parameters

Sr.No Parameter & Description
1

error_msg(Required)

.It specifies the error message. Limited to 1024 characters in length.
2

error_types(Optional)

It 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.

Return Value

This function returns FALSE if wrong error_type is specified, TRUE otherwise.

Example

Following is the usage of this function −

Live Demo 
<?php
 if ($test<10) {
    trigger_error("Number cannot be less than 10");
}
?>

This will produce the following result −

Number cannot be less than 10
php_function_reference.htm
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