PHP trigger_error() Function
The trigger_error() is an inbuilt function of PHP and is used to generates a user-level error/warning/notice message.
It will returns
It will returns
FALSE if wrong error_type is specified, TRUE otherwise.Syntax
trigger_error(error_msg,error_type)
Parameters
error_msg:The designated error message for this error. It's limited to 1024 bytes in length.error_type:The designated error type for this error.- Possible error types:
- E_USER_WARNING − Non-fatal user-generated run-time warning. Execution of the script is not halted.
E_USER_ERROR − Fatal user-generated run-time error. Errors that can not be recovered from. Execution of the script is 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.
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<?php
$my_num=15;
if ($my_num>10) {
trigger_error("Number cannot be larger than 10");
}
?>
Output.
It will show the following custom error
Notice: Number cannot be larger than 10 in C:\xampp\htdocs\php_error.php on line 4
trigger_error() function example
<?php
function my_func($var) {
if(is_numeric($var)) {
/* do some stuff*/
} else {
trigger_error('variable must be numeric');
}
}
$x = 'apple';
my_func($x);
?>
Output.
It will show the following custom error
Notice: variable must be numeric in C:\xampp\htdocs\roll-generator\php_error.php on line 6
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