php自定义错误处理用法实例

<?phperror_reporting(E_ALL);function ErrHandler($errorno, $errorstr, $errorfile, $errorline){  $display = true;  $notify = false;  $halt_script = false;  $error_msg = "<br>The $errorno error is occurring at $errorline in  $errorfile<br>";  switch($errorno)  {   case E_USER_NOTICE:   case E_NOTICE:   $halt_script = false;   $notify = true;   $label = "<B>Notice</B>";   break;   case E_USER_WARNING:   case E_WARNING:   $halt_script = false;   $notify = true;   $label = "<b>Warning</b>";   break;   case E_USER_ERROR:   case E_ERROR:   $label = "<b>Fatal Error</b>";   $notify=true;   $halt_script = false;   break;   case E_PARSE:   $label = "<b>Parse Error</b>";   $notify=true;   $halt_script = true;   break;   default:   $label = "<b>Unknown Error</b>";   break;  }  if($notify)  {   $msg = $label . $error_msg;   echo $msg;  }  if($halt_script) exit -1;}$error_handler = set_error_handler("ErrHandler");echo "<BR><H2>Using Custom Error Handler</h2><BR>";trigger_error("<BR>Error caused by E_USER_NOTICE</BR>", E_USER_NOTICE);trigger_error("<BR>Error caused by E_USER_WARNING</BR>", E_USER_WARNING);trigger_error("<BR>Error caused by E_USER_ERROR</BR>", E_USER_ERROR);trigger_error("<BR>Error caused by E_PARSE</BR>", E_PARSE);?>