php自定义错误处理用法实例

<?php
error_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);
?>