trigger_error() 用于在用户指定的条件下触发一个错误消息。它与内建的错误处理器一同使用，也可以与由 set_error_handler() 函数创建的用户自定义函数使用
定义和用法trigger_error() 函数创建用户定义的错误消息。
trigger_error() 用于在用户指定的条件下触发一个错误消息。它与内建的错误处理器一同使用，也可以与由 set_error_handler() 函数创建的用户自定义函数使用。
如果指定了一个不合法的错误类型，该函数返回 false，否则返回 true。
语法trigger_error(error_message,error_types)
参数描述error_message必需。规定错误消息。长度限制为 1024 个字符。error_types可选。规定错误消息的错误类型。 可能的值： •E_USER_ERROR
•E_USER_WARNING
•E_USER_NOTICE
代码如下:
function myError($errno,$errstr,$errfile,$errline){
switch($errno){
case E_USER_ERROR:
echo "My ERROR[$errno] $errstr
";
echo "Fatal error in line $errline of file $errfile";
exit(1);
break;
case E_USER_WARNING:
echo "My WARNING [$errno] $errstr";
break;
default:
echo "Unknown error type:[$errno] $errstr";
break;
}
}
set_error_handler("myError");
$age=-100;
if($agetrigger_error('age you input must>=0',E_USER_ERROR);
}
?>
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