PHP自定义错误

<?php
error_reporting(0);

function error_handler($errLevel, $errMsg, $errFile, $errLine) {
$errType = "Unknown";
switch($errLevel) {
case E_NOTICE:
case E_USER_NOTICE:
$errType = "notice";
break;

case E_WARNING:
case E_USER_WARNING:
$errType = "warning";
break;

case E_ERROR:
case E_USER_ERROR:
$errType = "error";
break;

default:
break;
}

echo "{$errType}:{$errMsg}发生在{$errFile}第{$errLine}行<br>";
}

set_error_handler("error_handler");

echo $_POST["name"];
trigger_error("unknown error", E_USER_NOTICE);
?>