有没有办法让Apache / PHP日志专门为什么要返回500？

I understand a 500 response can be returned under a variety of different scenarios, but is there any way to have the server log specifically what caused the 500? Or for that matter print it to the PHP page/output?

EDIT:

I'm on MediaTemple's Grid Service, display errors is on in phpinfo(), the following is in my PHP code: ini_set('display_errors',1); error_reporting(E_ALL|E_STRICT);

and error logging is turned on in my hosting configuration, yet when I tail the log, nothing appears when I hit refresh. Any ideas?

The cause of the 500 error should be in Apache's error log already. If PHP was responsible, then the error will be shown on screen if you have display_errors = On in php.ini.

You can try :

$log_file = 'c:temp\test_error.txt';
register_shutdown_function('handleShutdown');

function handleShutdown() {
    global $log_file;
    $error = error_get_last();
    if ($error !== NULL) {
        $info = "[SHUTDOWN] file:" . $error['file'] . " | ln:" . $error['line'] . " | msg:" . $error['message'] . PHP_EOL;
        file_put_contents($log_file, $info, FILE_APPEND);
    } else {
        file_put_contents($log_file, "SHUTDOWN ", FILE_APPEND);
    }
}