我希望能够捕获 die() 和 exit() 消息。这可能吗？我希望有类似于set_error_handler 和set_exception_handler 的东西。我查看了register_shutdown_function()，但它似乎没有包含违规die() 和exit() 调用的上下文。
我意识到die() 和exit() 是处理错误的糟糕方法。我不希望被告知不要这样做。 :) 我正在创建一个通用系统，并且希望能够优雅地记录 exit() 和 die() 如果由于某种原因有人（不是我）认为这是一个好主意。
【问题讨论】：
可以，但您需要 ob_start、ob_get_contents、ob_end_clean 和 register_shutdown_function
function onDie(){
$message = ob_get_contents(); // Capture 'Doh'
ob_end_clean(); // Cleans output buffer
callWhateverYouWant();
}
register_shutdown_function('onDie');
//...
ob_start(); // You need this to turn on output buffering before using die/exit
@$dumbVar = 1000/0 or die('Doh'); // "@" prevent warning/error from php
//...
ob_end_clean(); // Remember clean your buffer before you need to use echo/print
【讨论】：
根据PHP manual，在调用 die() 或 exit() 时仍应通知关闭函数。
Shutdown functions 和 object destructors 将始终被执行，即使 exit() 被调用。
似乎无法获取exit($status) 中发送的状态。除非您可以使用输出缓冲来捕获它，但我不确定您如何知道何时调用 ob_start()。
【讨论】：
如果 APD 可用，override_function() 可能会很有趣
【讨论】：
die 和 exit 是语言结构，而不是函数。
据我所知，这是不可能的。此处发布的一些解决方案可能有效，但它们需要大量额外工作或许多依赖项。没有办法轻松可靠地捕获 die() 和 exit() 消息。
【讨论】：
为什么不使用自定义错误处理来代替？如果没有，您总是可以使用 LD_PRELOAD 和 C 代码注入来捕获它:) 或者使用您的自定义重新编译 php：P
【讨论】：
如果您使用单点进入方法。 (index.php) 我可以推荐这个用于您的错误处理：
短版：
ob_start();
register_shutdown_function('shutdownHandler');
include('something');
define(CLEAN_EXIT, true);
function shutdownHandler() {
if(!defined("CLEAN_EXIT") || !CLEAN_EXIT) {
$msg = "Script stopped unexpectedly: ".ob_get_contents();
//Handle premature die()/exit() here
}
}
其他步骤和更详细：
大概是我的做法。我要做的事情比我在这里展示的还要多（处理数据库事务/回滚/发送电子邮件/编写日志/显示友好的错误消息/用户错误报告/等等），但这是所有这些背后的基本思想）。 希望它可以帮助某人。
<?php
//Some initialization
//starting output buffering. (fatalErrorHandler is optional, but I recommend using it)
ob_start('fatalErrorHandler');
//Execute code right at the end. Catch exit() and die() here. But also all other terminations inside PHPs control
register_shutdown_function('shutdownHandler');
//handling other errors: Also optional
set_error_handler('errorHandler');
try {
//Include of offensive code
include(...);
}
catch (Exception $ex) {
//Handling exception. Be careful to not raise exceptions here again. As you can end up in a cycle.
}
//Code reached this point, so it was a clean exit.
define(CLEAN_EXIT, true);
//Gets called when the script engine shuts down.
function shutdownHandler() {
$status = connection_status();
$statusText = "";
switch ($status) {
case 0:
if (!defined("CLEAN_EXIT") || !CLEAN_EXIT) {
$msg = "Script stopped unexpectedly: ".ob_get_contents();
//Handle premature die()/exit() here
}
else {
//Clean exit. Just return
return;
}
case 1: $statusText = "ABORTED (1)"; break;
case 2: $statusText = "TIMEOUT (2)"; break;
case 3: $statusText = "ABORTED & TIMEOUT (3)"; break;
default : $statusText = "UNKNOWN ($status)"; break;
}
//Handle other exit variants saved in $statusText here ob_get_contents() can have additional useful information here
}
// error handler function (This is optional in your case)
function errorHandler($errno, $errstr, $errfile, $errline) {
$msg = "[$errno] $errstr\nOn line $errline in file $errfile";
switch ($errno) {
case E_ERROR: $msg = "[E_ERROR] ".$msg; break;
case E_WARNING: $msg = "[E_WARNING] ".$msg; break;
case E_PARSE: $msg = "[E_PARSE] ".$msg; break;
case E_NOTICE: $msg = "[E_NOTICE] ".$msg; break;
case E_CORE_ERROR: $msg = "[E_CORE_ERROR] ".$msg; break;
case E_CORE_WARNING: $msg = "[E_CORE_WARNING] ".$msg; break;
case E_COMPILE_ERROR: $msg = "[E_COMPILE_ERROR] ".$msg; break;
case E_COMPILE_WARNING: $msg = "[E_COMPILE_WARNING] ".$msg; break;
case E_USER_ERROR: $msg = "[E_USER_ERROR] ".$msg; break;
case E_USER_WARNING: $msg = "[E_USER_WARNING] ".$msg; break;
case E_USER_NOTICE: $msg = "[E_USER_NOTICE] ".$msg; break;
case E_STRICT: $msg = "[E_STRICT] ".$msg; break;
case E_RECOVERABLE_ERROR: $msg = "[E_RECOVERABLE_ERROR] ".$msg; break;
case E_DEPRECATED: $msg = "[E_DEPRECIATED] ".$msg; break;
case E_USER_DEPRICIATED: $msg = "[E_USER_DEPRICIATED] ".$msg; break;
default: $msg = "[UNKNOWN] ".$msg; break;
}
//Handle Normal error/notice/warning here.
$handled = ...
if ($handled)
return true; //handled. Proceed execution
else
throw Exception($msg); //Be careful. this might quickly become cyclic. Be sure to have code that catches and handles exceptions. Else die() here after logging/reporting the error.
}
function fatalErrorHandler(&$buffer) {
$matches = null;
//Checking if the output contains a fatal error
if (preg_match('/<br \/>\s*<b>([^<>].*)error<\/b>:(.*)<br \/>$/', $buffer, $matches) ) {
$msg = preg_replace('/<.*?>/','',$matches[2]);
//Handle Fatal error here
return "There was an unexpected situation that resulted in an error. We have been informed and will look into it."
}
//No fatal exception. Return buffer and continue
return $buffer;
}
【讨论】：
是的：编写一个函数并使用它。
function kill($msg){
// Do your logging..
exit($msg);
}
【讨论】：